A son's love for his mother motivates the work of Dr. Jason K.C. Tong, 31, a general surgery resident at the Hospital of the University of Pennsylvania. KYW Newsradio's Denise Nakano reports. (Photo: Dr. Junqian Zhang)

<p>A son's love for his mother motivates the work of Dr. Jason K.C. Tong, 31, a general surgery resident at the Hospital of the University of Pennsylvania. KYW Newsradio's Denise Nakano reports. (Photo: Dr. Junqian Zhang)</p>

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