In this task, you are given a passage which has a question and the context. You have to generate an answer to the question based on the information present in the context.

Context: To investigate the prognostic value of the pre-treatment haemoglobin level in patients with advanced squamous cell head and neck cancer treated with induction polychemotherapy.', 'Seventy-two patients with advanced squamous cell head and neck cancer received primary combination chemotherapy consisting of docetaxel 75 mg/m(2) on day 1, cisplatin 100 mg/m(2) on day 1, and 5-fluorouracil (5-FU) 1000 mg/m(2)/day on days 1-4 (total dose 4000 mg/m(2)), repeated on days 1, 22 and 43 followed by chemoradiation. The data collected included pre-treatment haemoglobin, response to treatment, disease-free and overall survival.', 'The pre-treatment haemoglobin level was found to be a significant predictor of response to induction chemotherapy (P = 0.01) and an independent predictor of overall survival [hazard ratio (HR) 0.77, 95% confidence interval (CI) 0.58-1.03, P = 0.0001] and disease free survival (HR 2.09, 95% CI 1.41-3.09, P = 0.0001). Furthermore N-stage was found to be a significant prognostic factor of overall survival (HR 9.24, 95% CI 6.90-21.34, P = 0.005). The Eastern Cooperative Oncology Group performance status scale was also found to be significant for disease free survival (HR 7.66, 95% CI 2.61-22.46, P = 0.003).\Question: Does pre-treatment haemoglobin level predict response and survival after TPF induction polychemotherapy in advanced head and neck cancer patients?
In patients with advanced squamous cell head and neck cancer, the haemoglobin level prior to induction chemotherapy is significantly related to outcome including response and survival.

Context: Most hepatocellular carcinomas (HCCs) are associated with cirrhosis. Portal hypertension (PHT) and esophageal variceal bleeding (EVB) can limit the patient's treatment options. Surgical therapy in such patients is challenging. We performed devascularization plus liver resection or radiofrequency ablation (RFA) to treat HCC patients with concomitant EVB resulting from PHT secondary to cirrhosis. Such combined operations have never been reported for the management of HCC patients with variceal esophageal bleeding.", 'To evaluate two different treatment regimens for patients with HCC and EVB.', 'We evaluated 35 BCLC stage 0/A patients with HCC and EVB who underwent either devascularization plus liver resection (Group A) or devascularization plus RFA (Group B). We reviewed the safety and outcomes of the two groups and assessed risk factors for patient survival and tumor recurrence.', 'Significant factors for overall survival were surgical approach and Child-Pugh classification. Child-Pugh classification was the only independent risk factor for overall postoperative survival [hazard ratio (HR) 8.320, 95 % confidence interval (CI) 1.739-39.799, P = 0.008]. Age was the only independent risk factor for tumor recurrence (HR 4.025, 95 % CI 1.343-12.062, P = 0.013).\Question: Is radiofrequency ablation plus devascularization the preferred treatment of hepatocellular carcinoma with esophageal varices?
RFA plus devascularization is the preferred treatment of HCC with EVB. RFA plus devascularization should be considered in Child-Pugh class A patients below 50 years of age.

Context: We report on the early and intermediate-term follow-up results of self-expanding Wallstent (Schneider, Switzerland) implanted in children with congenital heart disease.', 'The inherent shortcomings of balloon-expandable stents prompted the trial of an alternative stent.', 'Twenty patients underwent 22 implantations of 25 self-expanding Wallstents between December 1993 and June 1997 in two institutions. The mean age and weight were 10.8+/-4.5 years and 30.5+/-14.2 kg, respectively. The patients were divided into two groups: 1) Group I comprised 17 patients with pulmonary arterial stenoses, 2) Group II comprised four patients with venous stenoses (one belonged to both groups). Sixteen patients underwent recatheterization at a median of 5.8 months (range 0.5 to 31, mean 8.1 months) after stenting. Hemodynamic and angiographic changes after the interventional procedures and complications were documented.', 'All the stents were successfully deployed in the intended position. In Group I, the narrowest diameter of the stented vessel increased from 4.1+/-1.5 to 8+/-2 mm (95% increase, p < 0.0001) while the systolic pressure gradient across decreased from 24.6+/-15.8 to 12.1+/-11.4 mm Hg (51% decrease, p = 0.001). In Group II, the dimensional changes of the narrowest segment increased from 4.3+/-0.5 to 7.5+/-0.4 mm (75% increase, p = 0.003), and the pressure gradient reduced from 5.0+/-2.9 to 0.9+/-1.0 mm Hg (82% decrease, p = 0.04) across the stented venous channel. Distal migration of two optimally positioned stents occurred within 24 h of implantation. At recatheterization, significant neointimal ingrowth (>30% of the expanded diameter) was noted in 7 (28%) of the 25 implanted stents. This responded poorly to balloon dilation. Predisposing factors for the neointimal ingrowth included stents of smaller diameter (<9 mm) and longer period after implantation.\Question: Do early and intermediate-term complications of self-expanding stents limit its potential application in children with congenital heart disease?
Self-expanding Wallstent could be deployed easily and safely to relieve vascular stenoses in children. The complications of distal migration, significant neointimal ingrowth and its unyielding design to overdilation limit its application to this patient group.