124
Participants
Start Date
August 1, 2018
Primary Completion Date
December 17, 2019
Study Completion Date
December 17, 2019
lidocaine spray
10% lidocaine spray 4 puffs
Placebo
Sterile water 4 puffs
Nalinee Panichyawat, Ratchathewi
Mahidol University
OTHER