Table 1

Characteristics of study subjects

Subject		Stage		Serum ACE (U/l)		BAL cells ×10⁶
Subject		Stage		Serum ACE (U/l)		EO	AM	PMN	LO
1	I	82	—	9.5	0.4	0.1
2	III	105	—	3.36	0.12	2.52
3	II	38	—	1.51	—	0.79
4	I	143	—	3.72	—	2.28
5	III	92	—	11.4	—	0.6
6	I	111	—	7.92	0.11	2.97
7	II	99	—	3.2	1.25	0.55
8	I	47	—	20.0	1.25	3.75
9	I	63	—	3.25	—	1.75
10	II	70	0.63	4.77	0.54	3.06
11	II	95	—	1.21	—	3.28
12	I	38	—	12.18	0.42	1.4
13	II	97	1.89	13.23	1.26	45.36
14	II	86	—	17.85	32.3	34.85
15	II	38	0.42	5.11	—	1.47
16	II	91	—	4.05	—	5.95

EO = eosinophil; AM = alveloar macrophage; PMN = neutrophil; LO = lymphocyte; ACE = angiotensin converting enzyme (normal range 23–71 U/l); BAL = bronchoalveolar lavage.