RT Journal Article SR Electronic T1 Kneeling delivery in America 2000 years ago JF Archives of Disease in Childhood - Fetal and Neonatal Edition JO Arch Dis Child Fetal Neonatal Ed FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP F245 OP F245 DO 10.1136/adc.2007.133678 VO 93 IS 3 A1 Bernal, J E A1 Briceno, I YR 2008 UL http://fn.bmj.com/content/93/3/F245.abstract AB