AU - Singh, Poonam TI - Collaborating centres: Rediscovering an extended arm of World Health Organization PT - PERS DP - 2015 Jan 1 TA - Journal of Indian Association of Public Health Dentistry PG - 11-13 VI - 13 IP - 1 4099- https://journals.lww.com/aphd/pages/default.aspx/article.asp?issn=2319-5932;year=2015;volume=13;issue=1;spage=11;epage=13;aulast=Singh;type=0 4100- https://journals.lww.com/aphd/pages/default.aspx/article.asp?issn=2319-5932;year=2015;volume=13;issue=1;spage=11;epage=13;aulast=Singh AB -