title: Long-term observation on qigong in prevention of stroke--follow-up of 244 hypertensive patients for 18-22 years.
mesh_terms: D000328:Adult; D000368:Aged; D001945:Breathing Exercises; D002561:Cerebrovascular Disorders / Q000517:prevention & control*; D005500:Follow-Up Studies; D006801:Humans; D006973:Hypertension / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D012044:Regression Analysis