11,880
Participants
Start Date
October 20, 2016
Primary Completion Date
November 10, 2017
Study Completion Date
December 5, 2017
Telephone call
From 20 October to 10 November 2016, telephone calls were given to the donors in the phone call group
SMS
Text messages were sent to an equal number of donors in the SMS group
Guangzhou Blood Center, Guangzhou
Guangzhou Blood Center
OTHER_GOV