My office number is 978.927.6763. I usually return calls by the end of the next business day. Periodically I take vacations or am away. My office answering machine will instruct you how and when to reach me. Please remember though, that mechanical problems can occur which might make reaching me difficult at some times.
In the event of a clinical emergency, you should always contact/proceed to your local hospital emergency room, and ask the physician there to notify me as to the outcome.