Interleukin-6 and interleukin-8 in cervical fluid in a population of Swedish women in preterm labor: relationship to microbial invasion of the amniotic fluid, intra-amniotic inflammation, and preterm delivery - Holst, R M; Mattsby-Baltzer, I; Wennerholm, U B; Hagberg, H; Jacobsson, B (Acta Obstet Gynecol Scand, 2005)