Calling all former rugby players, the International Rugby Board needs your help.
The IRB, AUT University, and the New Zealand Rugby Union is conducting a study into the long term effects of playing the sport.
The study is comparing the body's of 400 former rugby players aged between 35 and 55, with former cricketers of the same age.
IRB rugby health administrator, Peter Griffiths says it's similar, yet different to studies in the United States on concussion in American Football.
"It's a lot wider than that. Obviously concussion's a part of rugby but that's definitely not the focus of the study whatsoever - it's a holistic, kind of general help."