function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chittaro, Yannick & Sanchez, Andreas & Blanc, Mickaël', 1],
    ['Dejean, Pierre François Marie Auguste', 1],
    ['Majka, Christopher G.', 3],
    ['Mitter, Heinz', 1],
    ['Mitter, Heinz & A, Upper', 1],
    ['Otto, Robert L', 2],
    ['Otto, Robert L.', 23],
    ['Otto, Robert L. & Karns, Ken D.', 8],
    ['Seung, Jinbae & Lee, Seunghwan', 5],
    ['Vahtera, Varpu & Muona, Jyrki & Linna, Ari', 12],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=59)',
    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);