function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cao, Hai-Feng & Ya, Ji-Dong & Zhang, Qiao-Rong & Hu, Xiao-Jian', 1],
    ['Jarvis, Charlie', 5],
    ['Reich, Dieter & Mráz, Patrik & Šída, Otakar & Gutermann, Walter', 1],
    ['Turdiboev, Obidjon A. & Rouhan, Germinal & Allamurotov, Akmal L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 4, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);