function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulletin de la Société Philomathique de Paris, Série 7', 2],
    ['Copeia', 1],
    ['Japanese Journal of Ichthyology', 1],
    ['Monogr. Bur. Sci. Manila', 1],
    ['Natuurkunde Tijdschrift voor Nederlandsche-Indië', 1],
    ['Proceedings of the Biological Society of Washington', 1],
    ['Proceedings of the Linnean Society of New South Wales', 2],
    ['Verhandlungen des Naturhistorisch-Medizinischen Vereins zu Heidelberg', 1],
    ['Voorst', 1],
    ['Zootaxa', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);