2072906 PCR-RDB PCR-reverse dot blot 21 2072909 PCR-RDB polymerase chain reaction-reverse dot blot 11 2072907 PCR-RDB PCR-reverse dot blot hybridization 9 2072908 PCR-RDB PCR reaction and reverse dot blot 1 2072905 PCR-RDB PCR-reverse membrane hybridization 1 2072910 PCR-RDB Polymerase Chain Reaction based reverse dot blot 1