WEST LAFAYETTE, Indiana, Nov. 16 (TNSres) -- Purdue University issued the following news release: * * * Here is a list of research studies that currently are looking for participants. Study on preferences of potential users of continuous melatonin monitoring device to support sleep health * * * Researchers are conducting a study to understand the needs and preferences of the potential users of a continuous melatonin monitoring device to support sleep health. Individuals may be eligible to p more PR