function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['APESTEGUÍA, SEBASTIÁN & ROUGIER, GUILLERMO W.', 1],
    ['Allain, Ronan & Vullo, Romain & Rozada, Lee & Anquetin, Jérémy', 1],
    ['Apesteguía, Sebastián & Gómez, Raúl O. & Rougier, Guillermo W.', 3],
    ['Chambi-Trowell, Sofia A. V. & Martinell, Agust ́ ın G.', 3],
    ['Colenso, W.', 1],
    ['Gray, John Edward', 1],
    ['Keeble, Emily & Whiteside, David I & Benton, Michael J', 1],
    ['O, Aileen & Brien & Whiteside, David I. & Marshall, John E. A.', 1],
    ['Wettstein, O. Von', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);