Randomized, controlled trial of efficacy of midwifery care. - Turnbull ,D.; Holmes ,A.; Shields ,N.; Cheyne ,H.; Twaddle ,S.; Harper Gilmour ,W.; Mc Ginley ,M.; Reid ,M,.; Johnstone ,I,.; Geer ,I.; Mc Ilwaine ,G.; Burnett Luan ,C. (Lancet, 1996)