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.
A: DVDs will play on all existing Blu-ray players (with 1080p upconversion via HDMI in most cases); most current players will play DVD-R/RW recordable discs as well. Some early models lacked the ability to play CDs, but virtually all current models support CD playback (including homemade CD-Rs and CD-RWs).