So how many times did Cristiano Ronaldo undergo an MRI exam?
Ate least three that I could find:
More information here and there:
Woods C, Hawkins RD, Maltby S, Hulse M, Thomas A, Hodson A, & Football Association Medical Research Programme (2004). The Football Association Medical Research Programme: an audit of injuries in professional football--analysis of hamstring injuries. British journal of sports medicine, 38 (1), 36-41 PMID: 14751943