2004
January January; 18 (1): 1 - 266	February February; 18 (2): 269 - 490	March March; 18 (3): 493 - 767
April April; 18 (4): 769 - 1048	May May; 18 (5): 1051 - 1319	June June; 18 (6): 1321 - 1587
July July; 18 (7): 1589 - 1856	August August; 18 (8): 1859 - 2120	September September; 18 (9): 2123 - 2361
October October; 18 (10): 2363 - 2601	November November; 18 (11): 2603 - 2836	December December; 18 (12): 2839 - 3082