Write a 5-7 sentence paragraph in your own words summarizing the Introduction se

Mitro et al. (2012). The smell of age: Perception and discrimination of body odors of different ages. PLoS ONE 7(5): e38110.

Found here:

http://www.plosone.org/article/fetchObject.action?uri=info:doi/10.1371/journal.pone.0038110&representation=PDF

Write a 5-7 sentence paragraph in your own words summarizing the Introduction section of this article. There are 5 paragraphs in the Introduction section – one strategy for writing a good summary would be to write a sentence summarizing each paragraph.  Please write grammatically correct sentences.