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] [Article in Spanish] Arteaga-Vizcaino M, Espinoza Holguin M, Torres Guerra E, Diez-Ewald M, Quintero J, Vizcaino G, Estevez J, Fernandez N. Rev Med Chil. 2001 Oct;129(10):1121-9. Delayed cord clamping in very preterm infants reduces the incidence of intraventricular hemorrhage and late-onset sepsis: a randomized, controlled trial. Mercer JS, Vohr BR, McGrath MM, Padbury JF, Wallach M, Oh W. Pediatrics. 2006 Apr;117(4):1235-42. [Vitamin K 1 concentration and vitamin K-dependent clotting factors in newborn infants after intramuscular and oral administration of vitamin K 1] [Article in Hungarian] Goldschmidt B, Kisrakoi C, Teglas E, Verbenyi M, Kovacs I. Orv Hetil. 1990 Jun 17;131(24):1297-300. Vitamin K – An Alternative Perspective. Midwife Sara Wickham provides a much-needed update on vitamin K prophylaxis. AIMS Journal, Summer 2001, Vol 13 No 2