Cohort profile: the Halland osteoarthritis (HALLOA) cohort-from knee pain to osteoarthritis: a longitudinal observational study in Sweden.

Andersson MLE, Haglund E, Aili K, Bremander A, Bergman S.

BMJ Open. 2022 Jul 14;12(7):e057086. doi: 10.1136/bmjopen-2021-057086.PMID: 3583552