A man practices Laughter Yoga during the “World Laughter Day” celebrations in Hong Kong May 6, 2012. Laughter yoga was launched in 1995 by Dr. Madan Kataria, a physician in India, and there are now more than 6,000 clubs in 60 countries, the organization said. REUTERS/Tyrone Siu (CHINA – Tags: SOCIETY HEALTH) – RTR31O4C

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