A test of a new intervention or treatment on people for. detecting. -Tolerability. -Safety. -Efficacy. A Clinical trial is defined as a prospective study. comparing the effect and value of intervention. (s) against a control in human beings.
In fact, whether the DVD players play AVI videos or not, it depends on the DVD player model, the AVI video codec or the AVI video resolution/size: 1  Most DVD players only accept MPEG-2 in standard VOBs. 2  Though some newer DVD players can play AVI files, it only plays AVI which is encoded with DivX. However, AVI is a container video format which may encoded with different video codecs like DivX, Xvid, MPEG-4, H.263, WMV, MPEG-1 and etc.
You can play a DVD using RealPlayer Plus with the File menu by doing the following: 1  Click the RealPlayer Plus icon in the top left. 2  Select File. 3  Select Open from the new menu list. 4  Press the Browse button. 5  Next to Look In: select your DVD drive. 6  Select the chapter you want to watch, and enjoy the show.