function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. Bertrand', 1],
    ['Archiv für Molluskenkunde', 1],
    ['Archives du Muséum d\'Histoire Naturelle de Lyon', 1],
    ['Bulletins de la Société Malacologique de France', 2],
    ['Contributions to Natural History', 1],
    ['Corbis. L. Reeve & Co.', 1],
    ['Iconographie der Land- und Süsswasser-Mollusken', 1],
    ['Journal de Conchyliologie', 1],
    ['Linzer biologische Beiträge', 2],
    ['Proceedings of the American Philosophical Society', 1],
    ['Proceedings of the Boston Society of Natural History', 2],
    ['Proceedings of the Malacological Society of London', 9],
    ['Proceedings of the Zoological Society of London', 1],
    ['Renaud', 1],
    ['ZooKeys', 7],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=36)',
    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);