A wound must be ________ before a sterile dressing can be applied

Oxytocin is marketed under the trade name:

A) Progestasert B) Pitocin C) Estrogen D) Progesterone

____ bias occurs when a sample is selected scientifically, but not all respondents choose to participate and the resulting sample may not be representative of the target population.

A. Survival B. Non-response C. Loss-to-follow-up D. Selection