Abstract Background Osteoarthritis (OA) is a progressive and debilitating disease that often develops from a focal lesion and may take years to clinically manifest to a complete loss of joint structure and function. Currently. there is not a cure for OA. but early diagnosis and initiation of treatment may dramatically improve the prognosis and quality of life for affected individuals. https://poolsproductscanadas.shop/product-category/hayward-hdf-heater-parts/