Problem: An article entitled, "Herbal, Dietary Supplements Take Toll on Liver" By COLE PETROCHKO, MedPage appeared online on May 23, 2012. Read the following excerpt from the article and answer the following question. "The researchers looked at data from the Drug Induced Liver Injury Network, which evaluated patient information from eight sites across the U.S., from 2003 to 2011. Of 679 cases of liver injury, 93 were attributed to herbal or dietary supplements, Serrano said, adding that these patients tended to be younger than those who have similar liver injuries due to other medications." Is this an experiment, observational study, anecdotal evidence or survey? Need Assignment Help? Group of answer choices experiment observational study anecdotal evidence survey