English: Illustration of skin penetration of a traditional intramuscular injection and a novel transdermal patch. The needles of transdermal patch are much smaller and shorter than that of intramuscular needle.
日付
原典
"Principles and Practices of Transdermal Medicine - National Health Federation - Your Voice for Health Freedom." Principles and Practices of Transdermal Medicine - National Health Federation - Your Voice for Health Freedom. N.p., n.d. Web. 28 Oct. 2012. <http://www.thenhf.com/article.php?id=579>.