LAHORE : Former Punjab chief minister Dost Khosa called on Punjab Chief Minister Shahbaz Sharif at Raiwind on Sunday along with his father Senator Sirdar Zulfiqar Ali Khan Khosa and brother Hassamuddin Khosa.  Dost  reiterated that he would continue to work as a party worker and make efforts for further strengthening the party in the area. Speaking on the occasion, Shahbaz Sharif said workers were precious asset of the party and they were like children in the eyes of party heads.