laboratory study
(LA-bruh-tor-ee STUH-dee)
Research done
          in a laboratory. A laboratory study may use special
          equipment and cells or animals to find out if a drug,
          procedure, or treatment is likely to be useful in humans.
          It may also be a part of a clinical trial, such as when
          blood or other samples are collected. These may be used to
          measure the effect of a drug, procedure, or treatment on
          the body.