Read this: The function of Apollo as a "healer" is connected with Paean (-), the physician of the Gods in the Iliad, who seems to come from a more primitive religion. Paen is probably connected with the Mycenean pa-ja-wo-ne (Linear B: ), but this is not certain. He did not have a separate cult, but he was the personification of the holy magic-song sung by the magicians that was supposed to cure disease. Later the Greeks knew the original meaning of the relevant song "paean" (). The magicians were also called "seer-doctors" (), and they used an ecstatic prophetic art which was used exactly by the god Apollo at the oracles.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): Who is the physician of the Gods in the Iliad?
Paean