Umblical cord blood pH, blood gases, creatin posphokinase and MB isoenzyme analyses in preterm infants of ritodrine administered 24-34 weeks pregnant women as an indicator of perinatal asphyxia . Ann Med Res . 2021;3(2):0101-0106. Accessed July 2, 2025. http://www.annalsmedres.org/index.php/aomr/article/view/2490