function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bezděk, Jan & Hájek, Jiří', 1],
    ['Brady, H. B.', 43],
    ['Cairns, S. D.', 1],
    ['Conradie, Werner & Bittencourt-Silva, Gabriela B.', 1],
    ['Douvillé, Henri', 1],
    ['Fleury, Jean-Jacques', 10],
    ['Gedik, Fatma', 6],
    ['Ineich, Ivan', 1],
    ['Iorio, Osvaldo Di & Turienzo, Paola', 1],
    ['Mamo, Briony L.', 49],
    ['SIMMONS, MICHAEL & BIDGOOD, MICHAEL', 28],
    ['Santos, Bruna S. & Marques, Mariana P. & Bauer, Aaron M.', 4],
    ['Schönfeld, Joachim & Lübbers, Julia', 17],
    ['Symphonia, Tabita K. & Senthil, Nathan D.', 56],
    ['Toefy, R. & Gibbons, M. J. & McMillan, I. K.', 5],
    ['Other (13)', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=237)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);