Passive Smoking Exposure from Partners as a Risk Factor for ER+/PR+ Double Positive Breast Cancer in Never-Smoking Chinese Urban Women: A Hospital-Based Matched Case Control Study

• Jian-hua Tong ,

  Contributed equally to this work with: Jian-hua Tong, Zhi Li

  Affiliation Department of Medical Oncology, The First Hospital, China Medical University, Shenyang, China

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• Zhi Li ,

  Contributed equally to this work with: Jian-hua Tong, Zhi Li

  Affiliation Department of Medical Oncology, The First Hospital, China Medical University, Shenyang, China

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• Jing Shi,

  Affiliation Department of Medical Oncology, The First Hospital, China Medical University, Shenyang, China

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• He-ming Li,

  Affiliation Department of Medical Oncology, The First Hospital, China Medical University, Shenyang, China

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• Yan Wang,

  Affiliation Department of Medical Oncology, The First Hospital, China Medical University, Shenyang, China

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• Ling-yu Fu,

  Affiliation Department of Medical Oncology, The First Hospital, China Medical University, Shenyang, China

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• Yun-peng Liu

  * E-mail: cmuliuyunpeng@hotmail.com

  Affiliation Department of Medical Oncology, The First Hospital, China Medical University, Shenyang, China

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