I have applied to the ucsd-sdsu joint phd in bioengineering. still no word from them, although i got an email from sdsu saying 'SDSU-UCSD Engineering Joint Doctoral Applicant: Your application has been approved by the SDSU Engineering Doctoral Committee and is now under review at UCSD'. this email was sometimes in march, but up till now i haven't got any other responses. is it possible for ucsd to reject me after i have been accepted by sdsu? can anyone who understands how the admission process works help?