The associations between genetic variants and the concentrations of TPNs or the 6-MMPNs:6-TGNs ratio were evaluated by PLINK software using linear regression.



PLINK
Genetic variants were identified by MassARRAY (Sequenom) and multiple SNaPshot techniques. 
MassARRAY (Sequenom)
Genetic variants were identified by MassARRAY (Sequenom) and multiple SNaPshot techniques. 
SNaPshot