product transform OAS1_0031_MR1_mpr-4_anon_to_711-2C_t4
product=[OAS1_0031_MR1_mpr-4_anon_to_OAS1_0031_MR1_mpr-1_anon_t4][OAS1_0031_MR1_mpr-1_anon_to_711-2C_t4]
t4
 -0.028174 -0.854743  0.395433    9.3627
  0.008690  0.378583  0.793631   12.1621
 -0.974667  0.031538 -0.009383    0.7538
  0.000000  0.000000  0.000000    1.0000
scale:      1.042113
