Letters to the Editor

Zhang S Yu B Li L : Randomized, double-blinded trial evaluation of valsartan/hydrochlorothiazide combination therapy in mild to moderate essential hypertension in north-east China. J Int Med Res 2008; 36: 630–637.

Lacourcière Y Poirier L Hebert D : Antihypertensive efficacy and tolerability of two fixed-dose combinations of valsartan and hydrochlorothiazide compared with valsartan monotherapy in patients with stage 2 or 3 systolic hypertension: An 8 week, randomized, double blind, parallel group trial. Clin Ther 2005; 27: 1013–1021.

Devereaux P Choi P El-Dika S : An observational study found that authors of randomized controlled trials frequently use concealment of randomization and blinding, despite the failure to report these methods. J Clin Epidemiol 2004; 57: 1232–1236.

Guyat G Rennie D (eds): Users' Guides to the Medical Literature. a Manual for Evidence-based Clinical Practice. Chicago: AMA Press, 2002.

Gurbet A Turker G Girgin NK : Combination of ultra-low dose bupivacaine and fentanyl for spinal anaesthesia in out-patient anorectal surgery. J Int Med Res 2008; 36: 964–970.

Wassef MR Michaels EI Rangel JM : Spinal perianal block: A prospective, randomized, double-blind comparison with spinal saddle block. Anesth Analg 2007; 104: 1594–1596.

Carron M Freo U Veronese S : Spinal block with 1.5 mg hyperbaric bupivacaine: Not successful for everyone. Anesth Analg 2007; 105: 1515–1516.

Goker H Haznedaroglu IC Ercetin S : Haemostatic actions of the folkloric medicinal plant extract Ankaferd Blood Stopper®. J Int Med Res 2008; 36: 163–170.

Sharon N : Lectins: Past, present and future. Biochem Soc Trans 2008; 36: 1457–1460.

Chakravartula SV Guttarla N : Biochemical properties of ricin in immature castor seed Nat Prod Res 2008; 22: 600–606.

Pandolfino ER Namen AE Munske GR : A comparison of the cell-binding characteristics of the mitogenic and nonmitogenic lectins from lima beans. J Biol Chem 1983; 258: 9203–9207.