New revision

Some significant revisions have been made.  A chapter on incomplete autophagy was added to clarify what contitutes actual autophagy upregulation.  Also more diseases are being reported as having underlying cryptic infections.  And even more substances, nicotine for example, are now seen to affect autophagy.  A recent on-line open-access scientific review of the subject is now available at http://www.molecularneurodegeneration.com/content/4/1/16 and I wanted to add that reference as well...