1. Nitric oxide and regulation of heart rate in patients with postural tachycardia syndrome and healthy subjects. Gamboa A, Okamoto LE, Raj SR, Diedrich A, Shibao CA, Robertson D, Biaggioni I (2013) Hypertension 61(2): 376-81
    › Primary publication · 23283362 (PubMed) · PMC3621717 (PubMed Central)
  2. Low-dose propranolol and exercise capacity in postural tachycardia syndrome: a randomized study. Arnold AC, Okamoto LE, Diedrich A, Paranjape SY, Raj SR, Biaggioni I, Gamboa A (2013) Neurology 80(21): 1927-33
    › Primary publication · 23616163 (PubMed) · PMC3716342 (PubMed Central)
  3. Angiotensin II, independent of plasma renin activity, contributes to the hypertension of autonomic failure. Arnold AC, Okamoto LE, Gamboa A, Shibao C, Raj SR, Robertson D, Biaggioni I (2013) Hypertension 61(3): 701-6
    › Primary publication · 23266540 (PubMed) · PMC3573256 (PubMed Central)
  4. Synergistic effect of norepinephrine transporter blockade and α-2 antagonism on blood pressure in autonomic failure. Okamoto LE, Shibao C, Gamboa A, Choi L, Diedrich A, Raj SR, Black BK, Robertson D, Biaggioni I (2012) Hypertension 59(3): 650-6
    › Primary publication · 22311903 (PubMed) · PMC3312003 (PubMed Central)
  5. Sympathetic activation and nitric oxide function in early hypertension. Gamboa A, Okamoto LE, Diedrich A, Choi L, Robertson D, Farley G, Paranjape S, Biaggioni I (2012) Am J Physiol Heart Circ Physiol 302(7): H1438-43
    › Primary publication · 22287587 (PubMed) · PMC3330790 (PubMed Central)
  6. Neurohumoral and haemodynamic profile in postural tachycardia and chronic fatigue syndromes. Okamoto LE, Raj SR, Peltier A, Gamboa A, Shibao C, Diedrich A, Black BK, Robertson D, Biaggioni I (2012) Clin Sci (Lond) 122(4): 183-92
    › Primary publication · 21906029 (PubMed) · PMC3203411 (PubMed Central)
  7. Comparative efficacy of yohimbine against pyridostigmine for the treatment of orthostatic hypotension in autonomic failure. Shibao C, Okamoto LE, Gamboa A, Yu C, Diedrich A, Raj SR, Robertson D, Biaggioni I (2010) Hypertension 56(5): 847-51
    › Primary publication · 20837887 (PubMed) · PMC2959129 (PubMed Central)
  8. Renal impairment of pure autonomic failure. Garland EM, Gamboa A, Okamoto L, Raj SR, Black BK, Davis TL, Biaggioni I, Robertson D (2009) Hypertension 54(5): 1057-61
    › Primary publication · 19738158 (PubMed) · PMC2796115 (PubMed Central)
  9. Nocturnal blood pressure dipping in the hypertension of autonomic failure. Okamoto LE, Gamboa A, Shibao C, Black BK, Diedrich A, Raj SR, Robertson D, Biaggioni I (2009) Hypertension 53(2): 363-9
    › Primary publication · 19047577 (PubMed) · PMC2665259 (PubMed Central)
  10. PRNP M129V homozygosity in multiple system atrophy vs. Parkinson's disease. Shibao C, Garland EM, Gamboa A, Vnencak-Jones CL, Van Woeltz M, Haines JL, Yu C, Biaggioni I (2008) Clin Auton Res 18(1): 13-9
    › Primary publication · 18236005 (PubMed)