function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Entomologica Musei Nationalis Pragae', 32],
    ['Adansonia', 66],
    ['Biodiversity Data Journal', 1],
    ['Botanische Jahrbücher fur Systematik, Pflanzengeschichte und Pflanzengeographie.', 1],
    ['Bulletin of the United States Bureau of Fisheries', 1],
    ['Candollea', 5],
    ['Edinburgh Journal of Botany', 1],
    ['Genera Plantarum Eorumque Characteres Naturales Secundum Numerum, Figuram, Situm, & Proportionem Omnium Fructificationis Partium', 1],
    ['Histoire des plantes de la Guiane Françoise. Tome III', 1],
    ['Journal de Botanique', 2],
    ['Journal of the Arnold Arboretum', 1],
    ['Laurentius Salvius', 2],
    ['Order out of Chaos. Linnaean Plant Types and their Types', 4],
    ['Phytotaxa', 7],
    ['Plant Ecology and Evolution', 8],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=137)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);