function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Acta Biologica Universitatis Daugavpiliensis', 1],
    ['Bibliopolii Academici Novi', 1],
    ['Biodiversity Data Journal', 1],
    ['Christ. Gottl. Proft', 1],
    ['H. Steiner und Comp.', 1],
    ['Holmiae: Impensis Direct. Laurentii Salvii, 1758 - 1759.', 2],
    ['Ioannis Thomae Trattner', 1],
    ['L. Salvius', 1],
    ['Laurentii Salvii', 1],
    ['Laurentius Salvius', 15],
    ['Schwickert', 1],
    ['W. Walther', 1],
    ['Zootaxa', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=34)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);