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"However, each of these desirable qualities like attempting to be useful or supportive can have unintended side effects."

Chelation therapy is no joke, either, and can cause serious side effects and kidney damage.

A recent adverse side effect to the cancer treatment saw the King have a brief hospital stay, but that was described as a minor setback in a bigger picture of positive progress.

The visit comes after the King had recently spent a short time in hospital over temporary side effects from his cancer treatment.

He had a brief stay in hospital after suffering side effects from his cancer treatment, but was well enough to return to a series of engagements last week.