You do not have to dress to the nines, or wear your best clothes, for this kind of work.

VOA: special.2009.07.26

For example, your body reacts to stressful situations by raising your blood pressure and making your heart work harder.

VOA: special.2009.03.24

"they would like to receive a message that uses some kind of code, and instead of sending a message that reminds them of their pill, they would like a motivational message, like for example, 'it's time for your life.'" Services like that have been shown to work in low-income countries, and now they're starting to appear in richer countries.

VOA: standard.2010.02.24