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He located the views of dissident scientists who dispute the causal link between HIV and AIDS , solicited their opinions and then invited them to participate in a Presidential Advisory Panel of Aids experts .
 a Presidential Advisory Panel of Aids experts, He, dissident scientists who dispute the causal link between HIV and AIDS, who, their, them, Aids experts
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 a Presidential Advisory Panel of Aids experts, He, dissident scientists who dispute the causal link between HIV and AIDS, who, their, them, Aids experts