function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Grazia, Jocelia & Schuh, Randall T. & Wheeler, Ward C.', 1],
    ['Heiss, Ernst & AndreasE & Lederwasch, Manfred & RomedU', 8],
    ['Roca-Cusachs, Marcos & Paris, Mercedes & Mohagan, Alma', 1],
    ['Souma, Jun & Sakai, Yoshiaki & Ishikawa, Tadashi', 2],
    ['Zhou, Yanyan & Rédei, Dávid', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);