In one aspect of the invention, a retainer is applied to a body part such as the skin or mucous membrane of a patient, and one or more first step antibodies are brought into contact with the body part within {HEAD ~ the confines} of {TAIL ~ the retainer} 
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In one aspect of the invention , a retainer is applied to a body part such as the skin or mucous membrane of a patient , and one or more first step antibodies are brought into contact with the body part within { HEAD ~ the confines } of { TAIL ~ the retainer }
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