Link to full text articles :
http://www.ncbi.nlm.nih.gov/pubmed/25457043
http://ac.els-cdn.com/S0019057814002535/1-s2.0-S0019057814002535-main.pdf?_tid=886af4d0-4011-11e5-
9595-00000aacb362&acdnat=1439288155_e141a40b22504a12118445665dd12506
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