Each assessor is tested to determine their individual olfactory sensitivity using standard odorants. The assessors receive training that consists of olfactory awareness, sniffing techniques, standardized descriptors, and olfactometry responses. Assessors are also required to attend supplemental and re-certification courses. From the pool of “on call” assessors, a minimum of six are selected for a scheduled odor panel. Each odor panel should represent, as much as possible, a cross section of age and gender