function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 1],
    ['Kobayashi, Tadashi & Endo, Kazuo', 1],
    ['Lin, Xiao-Long & Yu, Hai-Jun & Wang, Xin-Hua & Bu, Wen-Jun', 2],
    ['Makarchenko, Eugenyi A.', 1],
    ['Makarchenko, Eugenyi A. & Endo, Kazuo & Wu, Jingyang', 12],
    ['Makarchenko, Eugenyi A. & Semenchenko, Alexander A.', 4],
    ['Rossaro, Bruno', 1],
    ['Tasdemir, Ayse & Akyildiz, Gurcay Kivanc', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    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);