Qutreach Program. One of the specific NIPR tasks, as noted in the latest as well as all previous NTPR Fact Sheets, is to "establish personal contact with as many test participants as possible" (20). Both the NNTPR and the MCNTPR developed active outreach programs, with the MCNTPR making this effort its highest priority in 1985 and 1986. The emphasis resulted in a considerable amount of additional information from participants who had not yet contacted DNA. As of 1 May 1986, the MCNTPR had sent letters with information on participation and radiation dose to 3,600 of the 4,500 Marine Corps personnel who used the toll-free DNA telephone number or wrote to the Agency. The correspondence went to all participants having identifiable addresses. Because addresses had changed and return addresses had not been given, 325 of the letters were returned (21). The MCNTPR has used and continues to use several strategies to locate additional personnel. One of the first involved a computer comparison check between known participants in the nuclear tests and retired Marines. Personnel who had not yet contacted DNA were sent questionnaires filled in with available information. They were asked to check the incorporated data, complete, and then return the forms in the stamped and addressed envelopes that had been enclosed (22). The last of these questionnaires were mailed in August 1985. The MCNTPR has had good success with advertisements in periodicals, such as Leatherneck Magazine and the Marine Corps Gazette, and letters to Marine Corps associations celebrating reunions. Among the groups recently contacted are the ist, 2nd, 3rd, 4th, 5th, and 6th Marine Division Associations; the Marine Corps League; and the Woman Marines Association. The MCNTPR sent 3,000 copies of the circular shown in figure 2 to the 2nd Marine Division. This circular alone drew 500 responses (22). Through the Outreach Program, the MCNTPR team has, to quote from the letter sent to the 2nd Marine Division Association, collected "useful information that normally cannot be obtained from service records." 43