function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bleeker, Pieter', 1],
    ['Carneiro, Miguel & Martins, Rogélia & Landi, Monica', 1],
    ['Cervigón, Fernando', 1],
    ['Golani, Daniel & Fricke, Ronald', 1],
    ['Howell Rivero, L.', 2],
    ['Kaga, Tatsuya', 3],
    ['Kaga, Tatsuya & Iwamoto, Tomio & Mishra, Subhrendu Sekhar', 3],
    ['Kaga, Tatsuya & Van Oijen, Martien J. P. & Kubo, Yoshikazu', 2],
    ['Laan, Richard Van Der & Eschmeyer, William N. & Fricke, Ronald', 1],
    ['Mucientes, Gonzalo & Arronte, Juan Carlos', 1],
    ['Osório, B.', 2],
    ['Radcliffe, L.', 1],
    ['Roule, L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);