Hayman perching stool.
D001172:Arthritis, Rheumatoid / Q000534:rehabilitation; D006233:Persons with Disabilities; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D010003:Osteoarthritis / Q000534:rehabilitation; D012046:Rehabilitation; D012656:Self-Help Devices