Long-term safety and efficacy of treating symptomatic, partial-thickness rotator cuff tears with fresh, uncultured, unmodified, autologous, adipose-derived regenerative cells isolated at the point of care: 40 months follow-up of a prospective, randomized, controlled, first-in-human clinical trial https://www.medrxiv.org/content/10.1101/2022.12.14.22283447