function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biodiversity Data Journal', 20],
    ['Bollettino delle Sedute dell’Accademia Gioenia di Scienze Naturali in Catania', 2],
    ['Bulletin de la Societe Vaudoise des Sciences Naturelles', 3],
    ['Fragmenta Faunistica', 1],
    ['Journal of Threatened Taxa', 1],
    ['Khumbu Himal', 1],
    ['Mededelingen Landbouwhogeschool Wageningen', 8],
    ['Nematologia Mediterranea', 3],
    ['Pakistan Journal of Nematology', 1],
    ['Verslagen en Mededelingen Plantenziektenkundige Dienst Wageningen', 3],
    ['Zootaxa', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=46)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);