Abbreviations

  1. With a few exceptions, acronyms of clinical trials have been omitted in this survey; however, see www.ClinicalTrials.gov, Act Magazine, International Standard Randomised Controlled Trial Number Register, or Nederlands Trial Register.
  2. Occasionally, the use of capital letters is arbitrary.
  3. Inclusion in this list does not necessarily imply any official status.
Xe
XFG
XFS
XGTD
XIAP
xid
XKS
XLA
XLDPP
XLID
XLMR
XLP
XLRS
XMEA
XML
XMP
XMRV
XO
XP
XPS