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Prevention of covid-19 and other acute respiratory infectio..:

Brunvoll, Sonja Hjellegjerde ; Nygaard, Anders Benteson ; Ellingjord-Dale, Merete...
Brunvoll, Sonja Hjellegjerde Nygaard, Anders Benteson Ellingjord-Dale, Merete Holland, Petter Istre, Mette Stausland Kalleberg, Karl Trygve Søraas, Camilla Lund Holven, Kirsten Bjørklund Ulven, Stine Marie Hjartåker, Anette Haider, Trond Lund-Johansen, Fridtjof Dahl, John Arne Meyer, Haakon Eduard Søraas, Arne Vasli . Prevention of covid-19 and other acute respiratory infections with cod liver oil supplementation, a low dose vitamin D supplement: quadruple blinded, randomised placebo controlled trial. The BMJ. 2022, 378.  , 2022