About the Authors

Kunling Shen

Affiliation Department of Respiratory Care, Beijing Children’s Hospital, Beijing, China

Tengbin Xiong

tbxiong@cn.imshealth.com

Affiliation Health Economics & Outcomes Research, IMS Health China, Shanghai, China

Seng Chuen Tan

Affiliation Health Economics & Outcomes Research, IMS Health Asia Pacific, Singapore, Singapore

Jiuhong Wu

Affiliation Department of Pharmacy, The 306th Hospital of PLA, Beijing, China

Competing Interests

Tengbin Xiong and Seng Chuen Tan are current employees of IMS Health, which received funds from HEC Pharm for this study. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials. No patents have been applied for relating to the content of the manuscript. None of the authors has any other financial or nonfinancial competing interests.

Author Contributions

Conceived and designed the experiments: KS TX SCT JW. Performed the experiments: TX SCT. Analyzed the data: TX SCT. Contributed reagents/materials/analysis tools: TX SCT. Wrote the paper: TX SCT. Study supervision: KS JW.