Buy this Article for $5.95

Have a coupon or promotional code? Enter it here:

When you buy this you'll get access to the ePub version, a downloadable PDF, and the ability to print the full article.


  1. Li, Chunyan PhD
  2. Fang, Shengbo MD
  3. Wang, Nan MD
  4. Qi, Lingli MD
  5. Liu, Yufei PhD