In HIV-infected people and AIDS patients in the oral representation, the prevalence of Kaposi's sarcoma-rate second only to candidiasis and hairy leukoplakia have a higher incidence.

A statement, written or oral, made during negotiations leading to a contract, may be a term of the contract or merely a representation inducing the contract.

It therefore has expanded the ability and possibility of representation of writing culture, and provided a completely new perception for understanding the inherent characters rooted in oral tradition.