What sources of information do individuals use when researching the treatment of hip and knee arthritis?

Individuals with hip and knee arthritis have many sources of information at their disposal when researching treatment options. Educational materials and advice may be available from their primary physician or orthopaedic surgeon, from television, the printed media and the Internet. The reliability and quality of information from some of these sources may be variable, especially where the parties providing the information have an interest in promoting a related product, technique or service.