anchor.diff:  1,Active,31,38,26,26,29,1291,1082,1388,1137,1400,Vaginal,0,3742,7
   2,Active,22,29,32,31,37,1097,1126,1156,1151,1187,Vaginal,0,3289,5
   3,Active,8,10,27,31,34,1029,1097,1200,996,1127,Vaginal,0,2948,2
  -4,Active,NA,0,NA,NA,NA,1274,NA,NA,0,NA,Vaginal,0,3090,NA
  +4,Active,NA,0,NA,NA,NA,1274,NA,NA,NA,NA,Vaginal,0,3090,NA
   5,Active,23,30,39,40,NA,1239,1420,1559,1458,NA,Vaginal,0,4309,1
   6,Active,30,32,29,27,43,1194,1220,1165,1079,1555,Vaginal,0,3600,4
   7,Active,19,27,23,19,NA,1012,1088,1158,1055,NA,Cesarean,2,4082,NA
   8,Active,20,24,23,22,22,1025,1140,1064,1114,1084,Vaginal,0,2806,4
  -9,Active,18,21,22,NA,26,1156,1188,1164,0,1241,Vaginal,0,3629,3
  -10,Active,19,32,30,NA,21,1181,1239,1253,0,1440,Cesarean,2,1928,4
  +9,Active,18,21,22,NA,26,1156,1188,1164,NA,1241,Vaginal,0,3629,3
  +10,Active,19,32,30,NA,21,1181,1239,1253,NA,1440,Cesarean,2,1928,4
   11,Active,26,31,30,25,35,1245,1246,1209,1243,1223,Cesarean,1,3487,1
   12,Active,23,19,16,15,23,1102,1181,1194,1201,1158,Vaginal,0,2834,3
   13,Active,16,18,19,22,23,1259,1234,1188,1194,1224,Cesarean,1,3770,7
  
positive.code: 47,Control,20,18,20,18,27,993,1075,1067,1097,1040,Vaginal,0,2920,7
  48,Control,16,12,17,9,22,799,780,851,753,817,Cesarean,1,3232,9
  49,Control,11,10,13,11,NA,1276,1209,1159,1100,NA,Vaginal,0,2790,NA
  50,Control,13,20,19,18,17,854,NA,NA,0,920,Vaginal,0,3255,NA
  51,Control,19,19,18,16,20,1097,955,901,878,920,Cesarean,1,3202,6
  52,Control,20,17,19,15,NA,897,813,NA,0,NA,Vaginal,0,2463,NA
  53,Control,17,13,13,11,14,1497,1354,1397,1393,1450,Vaginal,0,4223,4
  54,Control,18,0,17,11,NA,878,NA,NA,701,NA,Vaginal,0,2898,NA
  55,Control,15,15,15,10,14,993,992,1027,997,NA,Cesarean,1,3540,NA
  
negative.code: 18,Active,26,21,36,36,29,1024,1010,1119,1135,1044,Vaginal,0,3085,3
  19,Active,17,22,22,24,24,901,1044,1149,1147,1144,Vaginal,0,3330,3
  20,Active,20,27,28,28,29,1317,1428,1372,1330,1287,Vaginal,0,2722,4
  21,Active,17,24,25,NA,NA,765,867,728,NA,NA,Vaginal,0,3323,NA
  22,Active,34,30,24,20,22,928,1129,1090,1031,1208,Vaginal,0,3142,7
  23,Active,17,21,16,20,19,1147,1280,1418,1467,1554,Vaginal,0,3724,6
  24,Active,16,20,19,25,18,1155,1136,1168,1222,1250,Vaginal,0,3728,8
  25,Active,15,17,20,20,22,751,745,848,806,863,Vaginal,0,2600,3
  26,Active,19,26,26,21,26,1212,1265,1316,1231,1492,Vaginal,0,3629,4
  27,Active,26,25,27,30,NA,1090,1226,1195,1099,NA,Vaginal,0,3912,2
  28,Active,14,20,24,27,27,914,896,NA,NA,931,Vaginal,0,2892,7
  29,Active,17,16,21,24,28,1130,1204,1342,1343,1278,Vaginal,0,3629,3
  30,Active,16,17,17,18,17,1129,1143,1136,1030,1110,Vaginal,0,2982,NA
  31,Active,23,24,30,27,33,1245,1285,1303,1249,1137,Vaginal,0,2976,3
  32,Control,21,21,17,16,24,1059,888,1049,1043,1052,Vaginal,0,3686,5
  33,Control,21,20,20,19,18,1215,1015,1022,1010,1085,Cesarean,1,3317,8
  34,Control,18,11,13,12,16,1074,706,749,674,738,Cesarean,1,3289,1
  35,Control,14,20,20,25,24,1303,1342,NA,NA,1328,Cesarean,1,2722,1
  36,Control,28,24,24,16,NA,827,888,876,864,NA,Vaginal,0,3232,5
  37,Control,17,16,14,14,16,775,810,906,903,850,Vaginal,0,3402,4
  38,Control,21,17,19,19,22,1306,1402,1484,1343,1566,Vaginal,0,3544,1
  