function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Albano, Paolo G. & Bakker, Piet A. J. & Janssen, Ronald', 1],
    ['Cavallari, Daniel C. & Dornellas, Ana Paula S.', 2],
    ['Engl, Winfried', 1],
    ['Gofas, Serge & Luque, Ángel A. & Oliver, Joan Daniel', 2],
    ['Hansen, Thomas', 2],
    ['Hebert, E.', 1],
    ['Helwerda, Renate A. & Wesselingh, Frank P.', 3],
    ['Herbert, David G.', 20],
    ['Lamarck, J. B. P. A. de M. de', 1],
    ['Mariottini, Paolo & Smriglio, Carlo & Oliverio, Marco', 4],
    ['Muratov, Igor V. & Heyns-Veale, Elodie', 6],
    ['Negri, Mauro Pietro & Corselli, Cesare', 3],
    ['Pacaud, Jean-Michel', 7],
    ['Sacchetti, Claudia & Landau, Bernard & Ávila, Sérgio P.', 2],
    ['Simone, Luiz Ricardo L. & Cunha, Carlo M.', 3],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=59)',
    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);