Is Gestational Hypertension Protective against Perinatal Mortality in Twin Pregnancies?

• Qi-Guang Luo,

  Affiliations Department of Obstetrics and Gynecology, Sainte-Justine Hospital, University of Montreal, Montreal, Canada, Department of Statistics and Actuarial Science, University of Waterloo, Waterloo, Canada

  ⨯
• Ji-Yan Zhang,

  Affiliation Department of Obstetrics and Gynecology, Sainte-Justine Hospital, University of Montreal, Montreal, Canada

  ⨯
• Wei-Wei Cheng,

  Affiliation Department of Obstetrics and Gynecology, International Peace Maternity and Child Health Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai, China

  ⨯
• Francois Audibert,

  Affiliation Department of Obstetrics and Gynecology, Sainte-Justine Hospital, University of Montreal, Montreal, Canada

  ⨯
• Zhong-Cheng Luo

  * E-mail: zc_luo@yahoo.com

  Affiliations Department of Obstetrics and Gynecology, Sainte-Justine Hospital, University of Montreal, Montreal, Canada, Ministry of Education-Shanghai Key Laboratory of Children’s Environmental Health, Xinhua Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai, China

  ⨯