The authors would like to apologise for an error that occurred in the writing of this paper. In table 1 (25) two of the primer sequences were incorrect.
The sequence of GP6+ should have been as follows: GAAAAATAAACTGTAAATCATATTC.
The sequence of TS165 should have been as follows: TTTGTTACTGTTGTTGATACTACA.
All experiments reported in this study were performed with the correct primers and experimental data do not change as a result of this error.