Table A2.

Reasons for Exclusion.

Author	Reason for Exclusion	Comments
ADOLPHI 2009 [63]	Wrong study design	Duration less than 1 month
DITSCHEID 2009 [64]	Wrong study design	Cross-over trial without washout
FONOLLA-JOYA 2016 [65]	Wrong intervention	Only the intervention arm contained Vit D and other micronutrients
HO 2005 [66]	Wrong intervention	Only the intervention arm contained Vit D
KRUGER 2006 [67]	Wrong comparator	The comparison has phylloquinone
LEE 2015 [68]	Wrong study design	Duration less than 1 month
LUTWAK 1964 [69]	Wrong study design	Non-randomised study, no basal information