original passage: Although flatus possesses an odor, this may be abnormally increased in some patients and cause social distress to the patient. Increased odor of flatus presents a distinct clinical issue from other complaints related to intestinal gas. Some patients may exhibit over-sensitivity to bad flatus odor, and in extreme forms, olfactory reference syndrome may be diagnosed. Recent informal research found a correlation between flatus odor and both loudness and humidity content
original sentence: Recent informal research found a correlation between flatus odor and both loudness and humidity content
sentence2: Given the way this research was conducted, is it likely that participants were compensated, and that other difficult but necessary precautions were taken such as eliminating as many variables as possible, using a representative sample, etc.
sentence1: Although flatus possesses an odor, this may be abnormally increased in some patients and cause social distress to the patient. Increased odor of flatus presents a distinct clinical issue from other complaints related to intestinal gas. Some patients may exhibit over-sensitivity to bad flatus odor, and in extreme forms, olfactory reference syndrome may be diagnosed. informal research has recently inspired rigorous, university-funded studies that confirmed the results, finding a correlation between flatus odor and both loudness and humidity content