You asked a VERY deep question, probably too deep for a
Usenet response, but may I suggest visiting our Lightning
Hypertext of Disease Search engine at:
Set the search button to "Exact Word Match"
and enter the one word query:
You can focus your search after reading the preliminary
output from your query on the one-word term "apoptosis."
Sincerely, Jules Berman, Pres., Pathology Informatics, Inc.