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.
Rating Newest Oldest. Best Answer: Formats are the file extensions and compression modes used for various digital audio/ video files. A multiformat DVD should ideally play DVD-R/ DVD-RW (writable and rewritable recorded cds), MP3, MP4, MPEG, DAT, WMA, CDA, and CD-R/RW files. Divx and Avi files are mostly related to computer softwares and you should check it before buying that its specifications are clear about palying this type of mediafiles.