Peer referees help us by commenting on the clinical content of reviews, and reflect on whether the summary and conclusions are a fair reflection of the evidence included in them. We would like to acknowledge the following peer referees who have assisted with the production of our reviews and protocols:

A-B

Aaron, Shawn (Canada); Abdul-Majeed, Aggarwal, Praveen (India); Ahmad, Shaleen (UK); Albertson, Timothy E (USA); Alfageme, I (Spain); Al-Hindawi, Yasmeen (Australia); Aljadani, Rawabi (Saudi Arabia); Apiraksakorn, Amnuayporn (Australia); Araghi, Marzieh (UK); Ariani, Alarico (Italy); Arroyave, W (USA); Ashrafian, Hutan (UK); Babu, Suresh (UK);  BaHammam, Ahmed (Saudi Arabia); Barnes, Hayley (Australia); Barnes, Neil (UK); Barton, Christopher (Australia); Bateman, Eric (South Africa); Baumann, H (Germany); Bedi, Pallavi (UK); Ben-Dov, I (Israel); Bert, Fabrizio (Italy); Bervar, Jean-Francois (France); Bhaumik, Soumyadeep (India); Bilton, Diana (UK); Blais, Lucie (Canada); Blasi, Francesco (Italy); Boersma, Wim (Netherlands); Bott, Julia (UK); Britton, J (UK); Brooks, Dina (Canada); Brozek, Jan (Canada); Burge, Angela (Australia); Burki, Nausherwan (USA); Burney, Peter (UK); Burton, Martin (UK);

C-D

Cabrera, Antonio (UK); Calder, Philip (UK); Calverley, Peter (UK); Camargos, Paulo (Brazil); Cappiello, Jhaymie (USA); Carnes, Dawn (UK); Carvalho, Celso (Brazil); Castro, Mario (USA); Celis, Carlos (Columbia); Chaimani, Anna (Greece); Chakravorty, Indranil (UK); Chang, Anne (Australia); Charalampopoulos, Athanasios (UK); Chauhan, Bhupendrasinh (Canada); Chaves, Gabriela (Brazil), Chung, Frances (Canada); Clark, Chris (UK); Coffman, Janet (USA); Cohen, Judith (UK); Cooper, Chin, Lisa (USA); Christopher (USA); Cooper, Cindy L (UK); Corless, John (UK); Corris, Paul (UK); Cottin, Vincent (France); Coumou, Hanneke (the Netherlands); Cowie, Robert (Canada); Cox, Linda (USA); Craven, Vanessa (UK); Crossingham, Iain (UK); Cummings, Mike (UK); Currell, Rosemary (UK); Currie, Graeme (UK); Cushing, Jillian (UK); D'Avila, Rosangela (Brazil); Dahri, Karen (Canada); Dalcin, Paulo (Brazil); Daniels, Johannes (Netherlands); Daviskas, Evangelia (Australia); De Baets, F (Belgium); de Benedictis, F (Italy); de la Rosa Carrillo, David (Spain); De Soyza, Anthony (UK); Decramer, Marc (Netherlands); Dekhuijzen, Richard (the Netherlands); de Vries, Tjalling (the Netherlands); Doboszynska, Anna (Poland); Dogru, M (Turkey);  Doherty, Steven (Australia); Donald, Christine (Australia);Donker, Tara (the Netherlands); Donnay, Albert (USA); Donohue, James (USA); Douglas, Neil (UK); Dransfield, Mark (USA); du Bois, Ron (USA);

E-F

Edmonds, Marcia (Canada); Edwards, Marini (UK); Edwards, Steve (UK); Eichenberger, Philipp (Switzerland);  Emmett, Gary (USA); Encisco, E (USA); Engen, Rebecca (USA); Ergan, Begum (Turkey); Ernst, Armin (USA); Esquinas, Antonio (Spain); Estcourt, Lise (UK); Evans, Rachael (UK); Everard, Mark (UK); Ezedunukwe, Ifeanyi (Nigeria); Fan, Hong (China); Fan, Zhiyu (Singapore); Feldman, Charles (South Africa); Fellows, Jodie (UK); Fernstrom, J (USA); Ferreira, Diogenes Seraphim (Brazil); Ferrer, Montse (Spain); Fiander, Michelle (Canada); Finder, Jonathan (USA); Fiorelli, Alfonso (Italy); Fleming, Sharon (UK); Fowler, Stephen (UK); Frew, Anthony (UK); Fulton, Olivia (UK)

G-I

Gadomski, Anne (USA); Gallegos-Solórzano, Marcos (Mexico);  Garcia Cusco, Mireia (UK); Garrod, Rachel (UK); Gaude, G (India); Geddes, Duncan (UK); George, Maureen (USA); Gerovasili Vicky (Greece); Gershon, Andrea (Canada); Gimeno-Santos, Elena (Spain); Glaspole, Ian (Australia); Gloeckl, Rainer (Germany); Glossop, Alastair (UK); Goldstein, Roger (Canada); Gondin, Julien (France); Goodacre, Steve (UK); Gotshall, Robert (USA); Goyal, Vikas (Australia); Gradman, Josefine (Denmark);  Greening, Neil J (UK); Grillo, Lizzie (UK); Guevara, James (USA); Guimaraes, Fernando (Brazil); Gurgan, A (Turkey); Hahn, David (USA); Halpin, David (UK); Hanania, Nicola (USA); Hancox, Bob (New Zealand); Hansbro, Philip (Australia); Harding, Susan (USA); Harvey-Dunstan, Theresa (UK); Hashimoto, Simone (the Netherlands); Helms, Peter (UK); Hennessy-Harstad, E (USA); Hew, Mark (Australia); Hiligsmann, Mickael (the Netherlands); Hill, Adam (UK); Hill, Catherine (Australia); Hill, Kylie (Australia); Hnin, Khin (Australia); Hoenigl, Martin (Austria); Hoeper Marius (Germany); Hogben, Charlotte (UK); Holley, Anthony (Australia); Holmes-Liew, Chien-Li (Australia); Hopkinson, Nick (UK); Houchen-Wolloff, Linzy (UK); Hozawa, S (Japan); Hsu, Jeng-Yuan (Taiwan); Ides, Kris (Belgium); Iftikhar, Imran Hasan (USA); Ilowite, Jonathan (USA); Incorvaia, Cristoforo (Italy); Ind, Philip (UK); Irons, Yoon (Australia)

J-L

Jaana, Mirou (Canada); Jaramillo, Y (USA); Jat, Kana (India); Jenkins, Christine (Australia); Jones, Alice (Australia); Jones, Hayley (UK); Jordan, Amy S (Australia); Kaplan, Alan (USA); Karner, Charlotta (UK); Kassab, Manal (Jordan); Kelly, H William (USA); Kerstjens, Huib (the Netherlands); Kerwin, Edward (USA); Kiljander, Toni (Finland); King, Paul (Australia); Kintner, E (USA); Kline, Christopher (USA); Kohler, Malcolm (Switzerland); Kolb, Martin (Canada); Kolbe, John (New Zealand); Konstantinou, George (Greece); Krstic, Goran (Canada); Kuethe, Maarten (the Netherlands); Kumar, Lokender (India); Kumasawa, Junji (Japan); Kuna, Piotr (Poland); Kurtchuk, Liza (UK); Laghi, Franco (USA); Lam, Sandy (Canada); Lane, Donald (UK);  Lasserson, Toby (UK); Lazarus, Angeline (USA); Lee, Augustine (USA); Lehrer, Paul (USA); Lelgemann, Monika (Germany); Leverink, Anke (the Netherlands); Lewis, Christopher (New Zealand); Li, Patricia (Canada); Linzer, Jeffery (USA); Litonjua, Augusto (USA); Liu, Andy (USA); Liu, Elsa (Canada); Loebinger, Michael (UK); Loke, Yoon (UK); Lotshaw, Ana (USA); Lu, Guobing (UK);

M-O

MacGillivray, Megan (Canada); Maddocks, Matthew (UK); Magnan, Antoine (France); Mansour, Heidi (USA); Mapel, Doug (USA); Marques, Ana (Portugal); Marshall, Nat (Australia); Marti S (Spain); Martin, Mathioudakis, Alexandros (UK); Mason, Martina (UK); Molly (USA); Martin, Suzanne (UK); Maskrey, Neal (UK); Mayahi, Lila (UK); McCabe, Catherine (Ireland); McCarthy,  Bernard (Ireland); McKenzie, Sheila (UK); McKeough, Zoe (Australia); McLean, Susannah (UK); McNamara, Renae (Australia); Mellon, Lisa (Ireland); Menadue, Collette (Australia); Menzies, Daniel (UK); Michell, Clare (UK); Mickleborough, Timothy (USA); Millar, Ann B (UK); Mishra, Mayank (India); Mohammadieh, Anna (Australia); Mohapatra, Prasanta (India); Montuschi, Paolo (Italy); Morgan, Mike (UK); Muley, Prasad (India);Nabulsi, Mona (Lebanon); Moy, Marilyn (USA); Nanchal, Rahul (USA); Nathan, Steve (USA); Neuspiel, Daniel (USA); Ngai, Shirley (Hong Kong); Ni, Han (Malaysia); Nicolini, Antonello (Italy); Niewoehner, D (USA);  Nishiyama, O (Japan); Niven, Rob (UK); Normansell, Rebecca (UK); Nurmatov, Ulugbek (UK); Nyberg, Andre (Canada); Obase, Yasushi (Japan); O'Hoski, S (Canada); Ohta, Ken (Japan); Olthof, Margreet (Netherlands); Oguzulgen, Kivilcim (Turkey)

P-S

Page, Clive (UK); Paggiaro, Pierluigi (Italy); Paneroni, Mara (Italy); Pasteur, Mark (UK); Patel, Mitesh (UK); Patel, Nirali (USA); Paton, Jimmy (UK); Pavord, Ian (UK); Pelaia, G (Italy); Pepke-Zaba, Joanna (UK); Phan, Hanna (USA); Picton, Louise (UK); Pinnock, Hilary (UK); Piper, Amanda (Australia); Pisano, M (USA); Pollart, Susan (USA); Polverino, Mario (Italy); Powell, Colin (UK); Pradelli, Lorenzo (Italy); Price, David (Singapore); Pritchard, John (UK); Purucker, Mary (USA); Qureshi, Mosarrat (Canada); Rabinovich, Roberto (UK); Rael, Efren (USA); Ramsay, Michelle (UK); Ravesloot, M (the Netherlands); Reddel, Helen (Australia); Reinar, Liv Merete (Norway); Reznik, Marina (USA);  Rogers, Linda (USA); Roth, Michael (Switzerland); Rubin, Lewis (USA); Sahlman, Johanna (Finland); Sandbo, Nathan (USA); Sapey, Liz (UK); Sartore, Gina (Australia); Schembri, S (UK); Schouten, Harry (The Netherlands); Sears, Malcolm (Canada); Sharafkhaneh, Amir (USA); Shields, Michael (UK); Shin, Byung-Cheul (South Korea); Shiner, Robert (UK); Shukla, Vijay (Canada); Siler T (USA); Silverman, Michael (UK); Simonelli, Carla (Italy); Sinha, Ian P (UK); Singh, Sonal (USA); Singhi, Sunit (India); Smith, Jacky (UK); Smith Maeve (Canada); Smith, Sheree (Australia); Sohanpal, Ratna (UK); Spencer, Lissa (Australia); Srof, Brenda (USA); Steinke, Elaine (USA); Straube, Sebastian (Canada);  Supali, Taniawati (India); Swigris, Jeffrey (USA); Szefler, Stan (USA);

T-Z

Tamplin, Jeanette (Australia); Tan, Daniel (Australia);  Tang, Clarice (Australia); Tashkin, Donald (USA); Tattersfield, Anne (UK); Teyhan, Alison (UK); Thomas, Michael (UK); Thomas, Roger (Canada); Thomson, Neil (UK); Tinkelman, David (USA); Toelle, Brett (Australia); Torres, A (Spain); Turner, Alice (UK); Turner, Stephen (UK); van Boven, Job (the Netherlands); van der Wouden, Johannes (Netherlands); van Gaalen, Johanna (the Netherlands); van Geffen, Wouter (the Netherlands); Verbeek, Jos (Finland); Vertigan, Anne (Australia); Verwey, Renee (the Netherlands); Vethanayagam, Dilini (Canada); Vuillermin, Peter (Australia); Wang, Jeng-Shing (Taiwan); Ward, Cindy (USA); Weiss, Scott (USA); Wells, Mike (USA); White, Carl (USA); White, Patrick (UK); Whitten, Pamela (USA); Willeboordse, Maartje (the Netherlands); Wilson, Robert (UK); Wilson, Wai Sun Tam (Singapore); Woods, J (USA); Wu, Qibiao (China); Yang, Ian (Australia); Yuan, Nanci (USA); Zed, Peter (Canada); Zhang, Linjie (Brazil); Zang, Yang (China);Zosky, Graeme (Australia); Zoumot, Zaid (UK); Zwerink, Marlies (the Netherlands).