LAHORE: MQM leaders have launched its referendum campaign with 17-option questionnaire in Punjab to build a consensus among all segments of the society over the situation arises after the Abbotabad operation. Coordination committee member Iftikhar Randhawa opened the referendum drive at MQM Punjab office on Thursday, while party leaders Dr Shahzad Shamsi, Shaheen Gilani, Dr Iftikhar Bukhari and others were also present on this occasion.