P    #regions in PPM
# 2018-10-02 13:36:51 -0500  bmrbmb@tonga.nmrfam.wisc.edu
# low field   high field   mi   maxi
  1000.0  4.642419886297934  0.000  1000000.000  # for region 1
  4.642419886297934  0.9907216173221308  0.188  17.853  # for region 2
  0.9907216173221308  0.1  0.000  1000000.000  # for region 3
