Owada 1956 [43] (Japan) Consecutive healthy newborns Radiology of wrists 60/255 (24%)
Liu 1991 [44] (China) Autopsies after perinatal deaths Histology of ribs, ulnae and radii 44/124 (35%)
Ramavat 1999 [45] (Kuwait) Consecutive healthy newborns Rachitic rosary 75/858 (9%)
Yorifugi et al., 2008 [46] (Japan) Consecutive healthy 5e7 day olds