Find all pairs $(p,q)$ of prime numbers with $p>q$ for which the number $$\frac{(p+q)^{p+q}(p-q)^{p-q}-1}{(p+q)^{p-q}(p-q)^{p+q}-1}$$ is an integer. Please provide the value of $p+q$ for such pairs.

Let's think step by step and output the final answer within \boxed{}.
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