[Effect of oral and intramuscular vitamin K on the factors II, VII, IX, X, and PIVKA II in the infant newborn under 60 days of age].
Arteaga-Vizcaíno M, Espinoza Holguín M, Torres Guerra E, Diez-Ewald M, Quintero J, Vizcaíno G, Estévez J, Fernández N. Rev Med Chil. 2001 Oct; 129(10):1121-9.