ST. LOUIS--( BUSINESS WIRE )--Reinsurance Group of America, Incorporated (NYSE: RGA), a leading global provider of life and health reinsurance, reported first quarter net income available to RGA shareholders of $286 million, or $4.27 per diluted share, compared with $210 million, or $3.16 per diluted share, in the prior-year quarter. Adjusted operating income for the first quarter totaled $378 million, or $5.66 per diluted share, compared with $401 million, or $6.02 per diluted share, the year be...