ivity and cortisol. J PerMat Neonatal Num. 1998;1441:45-59. 55. Grunau RE. Holsti L. Peters JWB. Long-term consequences of pain in human neonates. Semin Fetal Neonatal Med. 2006;11(4): 268-275. 56. Grunau RE. Haley DW, Whitfield MF, et al. Altered basal conisol levels at 3. 6, 8 and 18 months in infants born at extre