function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bastida-Zavala, J. Rolando', 1],
    ['Bastida-Zavala, J. Rolando & Buelna, Alondra Sofía Rodríguez', 1],
    ['Pillai, Gottfried', 1],
    ['Sanfilippo, Rossana & Rosso, Antonietta & Reitano, Agatino', 2],
    ['Ten Hove, Harry A. & Kupriyanova, Elena K.', 1],
    ['Vinn, Olev & Hryniewicz, Krzysztof & Little, Crispin T. S.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);