There are multiple definitions:

1. European Paediatric Orthopaedic Society(English)

   • Pediatrics, Orthopedics, Organizations (clinical), Disability, Musculoskeletal system
   • https://doi.org…100/tsw.2004.26

2. enhanced polymer one-step staining(English)

   • a highly sensitive one-step immunostaining method. This simple and rapid technique can be applied to intra-operative frozen diagnosis
   • FACS, PCNA
   • Diagnostics, Immunology, Histochemistry
   • https://doi.org….1995.tb03430.x