 28 participants will be selected for this study based on their health status, currentpast medications, and ability to adhere to protocol-related requirements. Prior to entering the screening phase of the study, all potential study participants will have had to have at least 3 months of therapy for their unilateral, chronic symptoms 6 months Achilles tendinosis directed by a certified physiotherapist without a clinical response. At the first visit and after providing informed consent participants are evaluated against the study inclusionexclusion criteria and provide blood samples for screening assessments including virology. If suitable for study participation, participants will provide a biopsy from the scalp from which RCT-01 will be prepared. 