function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barthélémy, Christophe & Olmi, Massimo', 1],
    ['Engel, Michael S. & Grimaldi, David A.', 1],
    ['Madl, Michael', 1],
    ['Mita, Toshiharu & Olmi, Massimo', 1],
    ['Olmi, Massimo', 9],
    ['Olmi, Massimo & Copeland, Robert S.', 2],
    ['Olmi, Massimo & Copeland, Robert S. & Guglielmino, Adalgisa', 12],
    ['Olmi, Massimo & Marletta, Alessandro & Guglielmino, Adalgisa', 3],
    ['Olmi, Massimo & van Noort, Simon & Guglielmino, Adalgisa', 8],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Schüepp, Christof & Olmi, Massimo', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);