Study	Occurence of rickets	Adverse effects
Beser 1994 I1: vitamin D 400 IU/day per os C1: no placebo or other intervention	I1: 0/302 C1: 14/374	not investigated
Du 2004 I1: fortified milk, averaged calcium 245 mg/day per os I2: fortified milk, averaged calcium 245 mg/day per os, vitamin D3 133 IU/day per so C1: no placebo or other intervention	I1: 0/238 I2: 0/260 C1: 0/259	not investigated
Duhamel 2000 I1: vitamin D3 100,000 IU every 3 months per os C1: placebo	I1: 0/32 C1: 0/34	hypercalcaemia: I1: 0/32 C1: 0/34
Strand 2002/2003 I1: promoting of exclusive breastfeeding from birth, supplementation of solid foods at age 5 months, weaning at 12 to 18 months, vitamin D 300 IU/day per os during the first 12 months, calcium 378 mg/day per os from age 5 months to 24 months C1: no placebo or other intervention	I1: 100/183 C1: 33/46 based on analysed patients	not investigated
Symbols & abbreviations: I = intervention; C = control