Even the most experienced observers can miss the signs of poor oral health. (petdentalservices.com)
Briefly, for the analysis method development [see Additional file 2], colonies were first visually evaluated by experienced observer using conventional microscope. (biomedical-engineering-online.biomedcentral.com)
Third, people like Fred Bartlit and other experienced observers of the profession, for whom I have enormous respect, don't see real change here. (patrickjlamb.com)