The Infectious Diseases Society of America, a professional organization of doctors, cites the case of Josh Nahum, a 27-year-old skydiving instructor in Colorado.

美国传染病研究组织一个专业医师引用了乔希·内厄姆的例子，27岁的内厄姆是科罗拉多州的一名跳伞教练。

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Check with the LPGA or PGA websites to confirm your potential golf instructor's accreditation with that organization, and, how much experience the instructor possesses.

CNN: How to choose a golf instructor