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Bøg-Hansen E, Merlo J, Gullberg B, Melander A, Råstam L, Lindblad U.Bøg-Hansen E, et al. Among authors: gullberg b.Scand J Prim Health Care. 2004 Dec;22(4):222-7. doi: 10.1080/02813430410006620.Scand J Prim Health Care. 2004.PMID: 15765637
Drake I, Gullberg B, Sonestedt E, Wallström P, Persson M, Hlebowicz J, Nilsson J, Hedblad B, Wirfält E.Drake I, et al. Among authors: gullberg b.Public Health Nutr. 2013 Mar;16(3):468-78. doi: 10.1017/S1368980012002789. Epub 2012 May 29.Public Health Nutr. 2013.PMID: 22643161Free PMC article.