1999
January January; 154 (1): 1 - 309	February February; 154 (2): 313 - 632	March March; 154 (3): 634 - 961
April April; 154 (4): 963 - 1306	May May; 154 (5): 1309 - 1620	June June; 154 (6): 1621 - 1932
July July; 155 (1): 1 - 326	August August; 155 (2): 327 - 672	September September; 155 (3): 673 - 1004
October October; 155 (4): 1009 - 1397	November November; 155 (5): 1399 - 1779	December December; 155 (6): 1781 - 2182