Correspondence on Concerns About Methodology and Confounding

Affiliation

• ¹ Renin Chang, MD, PhD, Department of Emergency Medicine, Veterans General Hospital, Kaohsiung, Taiwan; Hui-Yuan Chen, BS, Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan; Yao-Min Hung, MD, PhD, Department of Internal Medicine, Kaohsiung Municipal United Hospital, Kaohsiung, Taiwan; and James Cheng-Chung Wei, MD, PhD, Department of Allergy, Immunology & Rheumatology, Chung Shan Medical University Hospital, Taichung, Taiwan, Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan, Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan, Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan.