function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brongniart, Alexandre', 1],
    ['Conrad, J. L.', 1],
    ['Conradie, Werner & Bittencourt-Silva, Gabriela B.', 1],
    ['Conradie, Werner & Branch, William R. & Watson, Gillian', 1],
    ['Dondorp, Esther & Denzer, Wolfgang', 1],
    ['Figueroa, Alex & Low, Martyn E. Y. & Lim, Kelvin K. P.', 2],
    ['Ineich, Ivan', 1],
    ['Laurenti, Joseph Nicolas', 5],
    ['Razzetti, Edoardo & Sindaco, Roberto & Grieco, Cristina', 1],
    ['Santos, Bruna S. & Marques, Mariana P. & Bauer, Aaron M.', 2],
    ['Segniagbeto, Gabriel Hoinsoude & Trape, Jean-François', 1],
    ['Sánchez-Vialas, Alberto & Calvo-Revuelta, Marta', 1],
    ['Tilbury, Colin R. & Tolley, Krystal A.', 1],
    ['Vasilyan, Davit & Cernansky, Andrej & Szyndlar, Zbigniew', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);