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IP address: 66.102.8.163
Time: 2024-03-28T19:31:59Z
URL: https://scholar.google.com/scholar_lookup?journal=BMJ+Open&title=Vitamin+D3+supplementation+in+patients+with+frequent+respiratory+tract+infections:+A+randomised+and+double-blind+intervention+study&author=P.+Bergman&author=A.C.+Norlin&author=S.+Hansen&author=R.S.+Rekha&author=B.+Agerberth&volume=2&publication_year=2012&doi=10.1136/bmjopen-2012-001663&