Age in Days at Radiation Therapy Course Start

**Semantic type:** Organism Attribute

**Definition:** Age of subject (in days) at the start of radiation therapy.

**Synonyms:** - AGE_AT_RT_START - AGE_AT_RT_START - AGE_AT_RT_START - AGE_AT_RT_START - AGE_AT_RT_START - AGE_AT_RT_START - Age at Radiation Therapy Course Start - Age in Days at Radiation Therapy Start