'replaced with two new codes; CPT codes 37252 and 37253' keeps naming the
successors, 'the reference to CPT code 76000 was intentionally deleted'
deletes no code, and in 'bundling of the deleted code, CPT 50395, with CPT
code 74485' only 50395 is deleted. deletion_readings(text, code) gives the
deleted/cpt_panel readings of one text with the fr_events logic.