Cod liver oil and respiratory infections in US children  Holick 2010
Ann Otol Rhinol Laryngol. 2010 Jan;119(1):64-70.
Cod liver oil, the ratio of vitamins A and D, frequent respiratory tract infections, and vitamin D deficiency in young children in the United States.
Linday LA, Umhau JC, Shindledecker RD, Dolitsky JN, Holick MF.
St Luke's-Roosevelt Hospital Center, New York, New York, USA.
Comment on:
    * Ann Otol Rhinol Laryngol. 2008 Nov;117(11):864-70. 
PMID: 20128190 [PubMed - in process]