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.
HD DVD discs can only be played in an HD DVD player. A standard DVD  player will not recognize the disc. HD DVD is no longer  manufactured with Bluray becoming the single HDâ¦ disc format  supported.    Unfortunately, HD DVD cannot be played in Bluray players either. If  you want to playback HD DVD, Macgo Blu-ray Player could playback HD  DVD and Blu-ray Discs.