The Rev. Slawomir Oder said Tuesday that special care is being applied to the analysis to preclude any possible future doubts.
A confirmed miracle is a condition for sainthood.
There have been reports that some of the doctors are not sure if the nun suffered from Parkinson's — the illness that also afflicted John Paul — or if she was wrongly diagnosed.
Pope Benedict XVI put John Paul on the fast-track for possible sainthood weeks after his 2005 death by waiving the customary five-year waiting period.
SIC: AP/INT'L