ISLAMABAD, Mar 10 (APP):A joint delegation of WHO, Human Development Research Foundation, Mental Health Innovation Network (MHIN) and Overseas Development Institute on Thursday called on Minister of State and Chairperson BISP, Marvi Memon. The purpose of the meeting was to find the common denominator between the organizations so that concerted efforts may be initiated for the welfare of children with learning disability in the country, a press release said issued here.