Baseline characteristics of subjects.

<p>Baseline characteristics of subjects.</p

Trends over time in the number of women newly diagnosed with breast cancer by age group.

<p>Trends over time in the number of women newly diagnosed with breast cancer by age group.</p

The ORs for breast cancer prevalence by quartile of monthly household income.

<p>The ORs for breast cancer prevalence by quartile of monthly household income.</p

Age-standardized breast cancer incidence and mortality rate, and the number of women screened for breast cancer in South Korea from 2000–2015.

<p>Age-standardized breast cancer incidence and mortality rate, and the number of women screened for breast cancer in South Korea from 2000–2015.</p

Characteristics of subjects by quartile of monthly household income.

<p>Characteristics of subjects by quartile of monthly household income.</p

The ORs for breast cancer prevalence by education level.

<p>The ORs for breast cancer prevalence by education level.</p

Cross-Linked Benzoxazine–Benzimidazole Copolymer Electrolyte Membranes for Fuel Cells at Elevated Temperature

Here we report new H₃PO₄-doped cross-linked benzoxazine–benzimidazole copolymer membranes showing high proton conductivity and long-term durability for use in proton-exchange membrane fuel cells at elevated temperatures (>100 °C). The cross-linked copolymer membranes were prepared by mixing of poly­[2,2′-(<i>m</i>-phenylene)-5,5′-bibenzimidazole] (PBI) with 3-phenyl-3,4-dihydro-6-<i>tert</i>-butyl-2<i>H</i>-1,3-benzoxazine (<i>p</i>BUa) in <i><i>N,N</i></i>-dimethylacetamide, with subsequent stepwise heating to 220 °C, and even large-sized films (30 cm × 140 m) could be easily prepared. The membranes showed high proton conductivities of up to 0.12 S cm^–1 at 150 °C under anhydrous conditions. Membrane–electrode assemblies (MEAs) employing the membranes showed operating voltages of 0.71 V at 0.2 A cm^–2. Furthermore, the MEAs displayed long-term durability up to 1999 cycles, with much slower performance decay, −0.03 mV h^–1, than those prepared using the PBI membrane in <i>in situ</i> accelerated lifetime mode (load cycling testing)

Characteristics of cancer survivors and controls.

<p>Data are expressed as number (%).</p><p>^aCo-morbid non-cancer conditions included hypertension, diabetes mellitus, stroke, heart disease, asthma, pulmonary tuberculosis, hepatitis B or C, liver cirrhosis, and renal failure.</p><p>Characteristics of cancer survivors and controls.</p

Adjusted odds ratios (95% confidence interval) for vitamin D insufficiency in cancer survivors and controls.

<p>Adjusted odds ratios (95% confidence interval) for vitamin D insufficiency in cancer survivors and controls.</p

Factors associated with vitamin D deficiency in cancer survivors and controls.

<p>Factors associated with vitamin D deficiency in cancer survivors and controls.</p