P    #regions in PPM
# 2012-03-21 10:12:10 -0500  mfjofre@watusi.nmrfam.wisc.edu
# low field   high field   mi   maxi
  1000.0  222.32501  0.000  1000000.000  # for region 1
  222.325  -16.6221  1.000  1000000.000  # for region 2