The third nationwide survey in Japan of Vitamin K deficiency in infancy - Hanawa, Y; Maki, M; Matsuyama, E; Tada, H; Urayama, T; Yamada, K; Mori, H; Nagao, T; Terao, T; Mikami, S; Shiraki, K; Onishi, S; Shirahata, A; Tsuji, Y; Motohara, K; Tsukimoto, I; Sawada, K (Acta Paediatr Jpn, 1990)