Describir: Mixed <named-content content-type="genus-species">Chlamydia trachomatis</named-content> Peptide Antigens Provide a Specific and Sensitive Single-Well Colorimetric Enzyme-Linked Immunosorbent Assay for Detection of Human Anti<italic toggle="yes">-</italic><named-content content-type="genus-species">C. trachomatis</named-content> Antibodies