Efficacy of fish intake on vitamin D status: a meta-analysis of randomized controlled trials

Ulrike Lehmann, Hanne Rosendahl Gjessing, Frank Hirche, Andreas Mueller-Belecke, Oddrun Anita Gudbrandsen, Per Magne Ueland, Gunnar Mellgren, Lotte Lauritzen, Helen Lindqvist, Anita Lill Hansen, Arja T Erkkilä, Gerda K Pot, Gabriele I Stangl, Jutta Dierkes