function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aldrete, Alfonso Neri García', 1],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Broadhead, Edward & Richards, Alison M.', 2],
    ['Georgiev, Dilian', 2],
    ['HAKIM, MARINA & HUANG, DI-YING & AZAR, DANY', 2],
    ['Laibl, Lukáš & Esteve, Jorge & Fatka, Oldřich', 2],
    ['Lienhard, Charles', 1],
    ['Lienhard, Charles & Mifsud, David', 3],
    ['Lienhard, Charles & Philip Ashmole, N.', 5],
    ['Ostrovsky, A. M.', 4],
    ['Ostrovsky, Artsiom & Georgiev, Dilian', 1],
    ['Schmidt, Evan R. & New, Tim R.', 1],
    ['Silva-Neto, Alberto Moreira da & Aldrete, Alfonso Neri García', 1],
    ['Smithers, C. N.', 3],
    ['Smithers, Courtenay Neville', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);