A knowledge-driven conditional approach to extract pharmacogenomics specific drug-gene relationships from free text

► Knowledge of drug-gene relationships is important for pharmacogenomics (PGx) studies. ► Automatic PGx-specific drug-gene relationship extraction from free text is difficult. ► We develop a conditional relationship extraction method using prior knowledge. ► We compare the conditional method to method using no prior knowledge. ► Conditional method has significantly better precision and F1 measure than unconditional method.