function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arriaga-Varela, Emmanuel & Escobar, Federico', 1],
    ['Bouchard, Patrice & Bousquet, Yves & Davies, Anthony E.', 1],
    ['Gimmel, Matthew L. & Bocakova, Milada', 1],
    ['Hinson, Kevin R. & Buss, Richard J.', 2],
    ['Kundrata, Robin & Bocakova, Milada & Bocak, Ladislav', 2],
    ['Lawrence, John F.', 2],
    ['Li, Yan-Da & Kundrata, Robin & Huang, Di-Ying & Cai, Chen-Yang', 5],
    ['Packova, Gabriela & Hájek, Jiří & Geiser, Michael', 15],
    ['Sakai, Masahiro', 5],
    ['Yoshitomi, Hiroyuki', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);