function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bellamy, C. L. & Lander, T.', 2],
    ['Frank, David', 12],
    ['Frank, David & Sekerka, Lukáš', 40],
    ['Kurosawa, Yoshihiko', 1],
    ['Qi, Zhi-Hao & Ai, Hong-Mu & Song, Hai-Tian', 11],
    ['Saunders, Edward', 1],
    ['Swezey, O. H.', 1],
    ['Tamadera, Yutaka & Yoshitake, Hiraku', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=70)',
    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);