Has mercury ever been used as a radio tracer to trace thiomersal in the human body? Many of the mercury isotopes pass through gold isotopes, so I would expect g

Has mercury ever been used as a radio tracer to trace thiomersal in the human body? Many of the mercury isotopes pass through gold isotopes, so I would expect gold to be relatively inert an inocuous, so it boils down to selecting suitable mercury isotopes for suitable halflife timescales (the halflife of the mercury isotope candidate to trace it, and the halflife of the gold daughter nucleus so as to remain gold throughout the test subject's lifetime)