Pfizer: Celebrex Safe After News Report  NEW YORK/OTTAWA (Reuters) - Pfizer Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=PFE.N target=/stocks/quickinfo/fullquote"&gt;PFE.N&lt;/A&gt; said on  Thursday its arthritis drug Celebrex was safe after a report in  a Canadian newspaper linked it to 14 deaths,