function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boonyanusith, Chaichat & Athibai, Sujeephon', 2],
    ['Clément, Michel & Moore, Colin G.', 10],
    ['Duè Rbaum, S. Seifried J.', 2],
    ['Gheerardyn, Hendrik & Seifried, Sybille & Vanreusel, Ann', 2],
    ['Kihara, Terue & Huys, Rony', 4],
    ['Seifried, Sybille & Plum, Christoph & Schulz, Maximilian', 3],
    ['Soenmez, Serdar & Sak, Serdar & Karaytug, Suephan', 3],
    ['Suárez-Morales, Eduardo & Fuentes-Reinés, Juan Manuel', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);