function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abhandlungen der Physikalischen Klasse der Königlich-Preussischen Akademie der Wissenschaften', 1],
    ['Annali del Museo Civico di Storia Naturale di Genova', 1],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 6],
    ['Ezhegodnik Zoologicheskogo muzeia', 2],
    ['Izviestiia Imperatorskoi Akademii Nauk', 4],
    ['Journal of the Bombay Natural History Society', 1],
    ['Memorie della Società Entomologica Italiana', 2],
    ['Mitteilungen aus dem Naturhistorischen Museum in Hamburg', 3],
    ['Veröffentlichungen des Deutschen Kolonial Ubersee-Museums, Bremen', 4],
    ['Zoologischer Anzeiger', 1],
    ['Zootaxa', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=29)',
    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);