On 28 June 2007, the Spice Girls held a surprise press conference at The O2 Arena saying that they had been reuniting to embark on a worldwide live performance tour, The Return of the Spice Girls, beginning in Vancouver on 2 December. Methods: A 3-arm parallel-team RCT was executed between July 2017 and December 2019. Five phone surveys had been conducted at baseline and at 3, 6, 9, and 24 months by blinded interviewers.