[stories with bears]

I've searched but can't find anything, really, on the topic of skill collaboration (if such a thing even exists!).

Is there any RAW way to reflect more than one player working together on a skill roll? For example, it seems like a team of surgeons working together should have a decent bonus to a Surgery roll—more eyes to spot potential screw-ups, and more hands to provide assistance.

At the same time, though, there are skills in which collaboration could prove disastrous if one of the people involved is incompetent. If someone blunders into the surgery with a single point of First Aid, they could botch the entire thing no matter how skilled the rest of the team is.

If there is no RAW way to reflect this, any suggestions for house rules? I considered averaging the skills of everyone involved, but it seems somehow "off" that a surgeon with Surgery 14 has a better shot working alone than he does with two Surgery 12 assistants.