IMO....no need to add any more BA.....should be fine
Adv Exp Med Biol 343 : 215226 Arslanian SA et al

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Optimal use: deep intramuscular injection only, daily dosing in the correction phase then weekly maintenance, with B12 blood test before and after to assess response
The timespan for the onset of the pigmentation might vary from days to several years, and it then becomes ever lasting, making the diagnosis of argyria not discardable regardless of the amount of time passed since exposition and first-time pigmentation observation [8,81,83,87,134,164,165,188,222,244]
Subsequently, a customized optical source was used that coupled ultraviolet interference or cutoff filters to a 2.5-kW xenon arc light system to produce isolated ultraviolet B or isolated ultraviolet A 9