There are multiple definitions:

1. Personalized Recovery Oriented Service(English)

   • a comprehensive model that integrates rehabilitation, treatment, and support
   • Rehabilitation, Mental health
   • https://my.omh.…dll?PortalPages

2. partially reduced oxygen species(English)

   • ROS, TGN, UVA
   • Oxygen

3. PIK3CA-Related Overgrowth Spectrum(English)

   • its rarity and heterogeneity hamper the correct estimation of its epidemiology
   • PIK3CA
   • Genetics, Epidemiology
   • https://doi.org…431-023-01414-9