My 65 year old father needs gallbladder surgery, we need a second opinion?

Sir/Madam,
Please give me some advice about on my fathers treatment, he is now 65 years old.He has been suffering from asthma for a long years about 25-30 years back, along with this disease he also suffer a gall bladder stone ( as per report 30 gm weight) but some doctors are concerned it is not possible to recover the stone by surgery for the asthma patient. So, Sir we have not taken a concrete decision for further treatment for both of diseases. So please give us your valuable advice to recover the stone for further treatment.
Thanking you





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