Get literature development-stage benchmarks

Source-linked, peer-reviewed development-stage cost and elapsed-time estimates in 2018 USD: 13 published therapeutic-area profiles, the pooled All profile retained at root for compatibility, and explicit mappings from PhaseFolio indications to the closest source category. Rare Disease remains unavailable with no pooled fallback. Display/reference only: these values are neither PhaseFolio network benchmarks nor rNPV model inputs.