Loads data from multiple sources for the EMBRACE-I study, processes them, and joins them by the `embrace_id` column. The function handles T-stage data, morbidity outcomes, and main study data, combining them into a comprehensive dataset.
Arguments
- file_path
Character, path to the directory containing the primary data files
- add_new_columns
Logical, if TRUE, calculate and add derived columns (default: TRUE)
- mapping_file
Character, path to the column mapping table file
- filter_cohort
Logical, if TRUE, filter to include only patients with local failure data (default: TRUE)