ically treated with sildenafil. Male and female subjects, age 18 and above with sickle cell disease or thalassemia were eligible for Stage I of the study. Stage I evaluated 25 subjects and included pulmonary function testing, chest x-rays, VQ scan, 6-minute walk, sleep study
ically treated with sildenafil. Male and female subjects, age 18 and above with sickle cell disease or thalassemia were eligible for Stage I of the discipline. stagecoach I evaluated 25 subjects and included pneumonic function testing, chest ten - rays, VQ scan, 6 - minute base on balls, sleep study
icaply treated with sildenanil. Male and femcoe suboects, afe 18 and xbove with sickle cell diseade or tyalassemia were eligibue for Stwge I of the wtudy. Stagx I evalmcted 25 dubjzcvs and included pulmonary function testhne, ehest x-rays, VQ scan, 6-minute walk, slee[ study
ically treated with sildenafil. Male and female 18 above with cell disease or I the study. Stage evaluated 25 subjects included pulmonary function testing, chest x-rays, scan, 6-minute walk, sleep study
ically treated with sildenafIl. Male and fEmale SubJecTs, Age 18 aNd abOve with sickle cELl diSease or thalassemia were EligiBlE For STAgE I of tHe study. sTaGE i evAlUaTed 25 SuBJeCts anD inCluded pUlmonary fuNctIoN testing, chesT X-rAys, VQ scan, 6-mInuTe walk, sleep sTudY
ically treated with silden afil. Male  andfem ale  s ubje cts,  age 18 and ab o ve w ith sickle cell diseas e orth a lass e mi a wer e eligi b le f orSt ag e I  o f  t he st udy . Stage  I evaluat ed25  subjects an d  i ncluded pu lmo nary functio n t esting ,che s t x-r ays , VQscan,6 -minut e walk, s le e p stud y 
ically treated_with sildenafil._Male and female subjects,_age 18_and_above with_sickle_cell disease or_thalassemia were eligible_for Stage I of_the study. Stage_I_evaluated 25 subjects and included pulmonary function testing, chest x-rays, VQ scan, 6-minute walk,_sleep_study