Pfizer Inc., which just acquired fellow drugmaker Wyeth, is closing six of the two companies' research sites and keeping open 14 others. Two Cambridge, Mass., sites will operate as one. Following is a list of the sites:

Less than a month after buying Wyeth, drug giant Pfizer Inc. has mapped out a new structure for its research and development operations.

Moody's Investors Service upgraded the senior unsecured ratings of Wyeth, citing the execution of an outstanding bonds agreement with Wyeth.

The new Merck & Co. has become the world's second-biggest drugmaker overnight with a huge acquisition, but it still has a fat wallet and plans more wheeling and dealing.

Wyeth Pharmaceuticals will get a new trial to determine if the drugmaker should pay punitive damages to a woman who got breast cancer after taking hormone replacement therapy, a federal appeals court ruled Monday.

Pfizer Inc. said Wednesday it awarded bonuses of $1 million or more to two executives after completing its $68 billion purchase of former rival Wyeth.

Pfizer's acquisition of Wyeth will add to the pharmaceutical giant's diversity, which over time will help boost the company's stock, CEO Jeff Kindler told CNBC Tuesday.

Pfizer completed its roughly $67 billion acquisition of U.S. rival Wyeth on Thursday, as the world's largest drugmaker gets even bigger.

Pfizer Inc.'s $68 billion purchase of Wyeth will close Thursday after antitrust regulators in the U.S. and Canada cleared the deal.

Pfizer has won U.S. antitrust approval to buy Wyeth after agreeing to sell some assets to prevent it from acquiring a monopoly in the market for some animal vaccines and pharmaceuticals, the Federal Trade Commission said on Wednesday.

Women whose breasts became tender after taking hormone replacement therapy had nearly twice the risk of developing breast cancer than women whose breasts did not become tender on the drugs, researchers said.

Stocks ended lower Friday as a dismal jobs report capped a string of disappointing economic reports this week, which cast doubt on the recovery. It was the market's second straight down week in which stocks have lost more than 3 percent.

Stocks tried to push higher Friday as the dollar's retreat helped the market but investors remained worried about the recovery in the wake of some disappointing economic reports.

Stocks opened lower Friday after disappointing reports on jobs and manufacturing.

Stock index futures plunged as September nonfarm payroll declines were far worse than Wall Street estimates.