Complex sentence: David N. Weisstub, Guillermo Díaz Pintos, China is not alone in encountering donation difficulties-demand outstrips supply in most countries, and the world-wide shortage has encouraged some countries--such as India--to trade in human organs.
Split into simpler sentences: David N. Weisstub, Guillermo Díaz Pintos, China is not alone in encountering donation difficulties; demand outstrips supply in most countries. The world-wide shortage has encouraged some countries--such as India--to trade in human organs.