109
Participants
Start Date
May 1, 2017
Primary Completion Date
December 31, 2019
Study Completion Date
March 31, 2020
monitored vit D supplementation
The vit D supplementation dose start from dose 500IU from 7th day of age and is modified based on vit D measurement at 4 week of age for infants born \<30 GA, at 8 week of age for infants born \<26 GA at 35+/-2 weeks PMA(postmenstrual age), +/-at 40+/-2 weeks PMA according to the protocol.
standard vit D supplementation
The vitamin D supplementation dose is 500IU from 7th day of age.
Princess Anna Mazowiecka Hospital, Warsaw
Medical University of Warsaw
OTHER
Princess Anna Mazowiecka Hospital, Warsaw, Poland
OTHER