Funding for this research was provided by:
Received: 21 March 2020
Accepted: 7 May 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: The study protocols were approved by the Institutional Review Board of National Yang-Ming University (approval No. YM105009E).
: Not applicable.
: YFW has received honoraria as a speaker from Taiwan branches of Allergan, Pfizer, Eli Lilly, Novartis, and Sanofi. He has received research grants from the Taiwan Minister of Technology and Science, and Taipei Veterans General Hospital.SJW has served on the advisory boards of Eli Lilly, Daiichi-Sankyo, and Taiwan Novartis. He has received honoraria as a moderator from Allergan, Pfizer, Eli Lilly, Bayer, and Eisai. He has received research grants from the Taiwan Minister of Technology and Science, National Yang-Ming University, Taipei Veterans General Hospital, Taiwan Headache Society, Taiwan Pfizer, Taiwan Novartis, and Taiwan Eli Lilly. CWT, YCY, YCC, and BCS declared no conflict of interest.