On 28 June 2007, the Spice Girls held a surprise press conference at The O2 Arena announcing that they were reuniting to embark on a all over the world concert tour, The Return of the Spice Girls, setting up in Vancouver on two December. Methods: A 3-arm parallel-team RCT was done concerning July 2017 and December 2019. Five telephone surveys have been executed at baseline and at 3, 6, 9, and 24 months by blinded interviewers.