The phone rings in Dr. Stein’s house

It’s 10pm when the phone rings in Dr. Stein’s house.

“It’s Dr. Gold,” says his wife, passing him the phone,

“I do hope it’s not another emergency.”

Dr. Stein takes the phone and says,

“Hi, what’s up?”

“Don’t worry, everything’s OK,” replies Dr. Gold.

“It’s just that I’m at home with Dr. Lewis and Dr. Kosiner. We’re having a game of bridge and we’re short one player so we thought you might like to come over and join us?”

“Sure …. yes, of course,” replies Dr. Stein, putting on a serious voice,

“I’m leaving right now.” And he puts down the phone.

“What’s happened?” his wife asks, with a worried look.

“It’s very serious,” Dr. Stein replies.

“They’ve already called three doctors.”