1998
January January; 139 (1): 3 - 435	February February; 139 (2): 437 - 818	March March; 139 (3): 821 - 1465
April April; 139 (4): 1467 - 2197	May May; 139 (5): 2199 - 2656	June June; 139 (6): 2659 - 3037
July July; 139 (7): 3041 - 3364	August August; 139 (8): 3371 - 3661	September September; 139 (9): 3679 - 4028
October October; 139 (10): 4035 - 4431	November November; 139 (11): 4435 - 4747	December December; 139 (12): 4753 - 5270