Complex sentence: People who search for health information online are frequently lead to Wikipedia, while surveys of physicians have found usage rates of between 50% and 100%, and it is the second most used Internet site by medical students after Google.
Split into simpler sentences: People who search for health information online are frequently lead to Wikipedia. While surveys of physicians have found usage rates of between 50 and 100% and it is the second most used Internet site by medical students after Google.