Setting/Participants: The study was conducted from July 10, 2010 to January 12, 2011 in the maternity ward of a
Taipei City regional teaching hospital, site of approximately 220 to 250 births per month. Ninety-two expectant mothers
were recruited (recruitment rate: 70.8%) and allocated by block randomization into the two arms of the study. In total,
80 women completed the trial: 41 in the control group and 39 in the experimental group