function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aguilar-Aguilar, R. & Ruiz-Campos, G. & Martorelli, S.', 1],
    ['Arai, Hisao P. & Smith, John W.', 11],
    ['Clark, W. C.', 1],
    ['Fugassa, Martin H.', 1],
    ['González-Solís, David & Mariaux, Jean', 1],
    ['Lunaschi, Lia I. & Álvarez, Victor Hugo Merlo', 1],
    ['Moravec, František & Justine, Jean-Lou', 1],
    ['Paredes-León, Ricardo & García-Prieto, Luis', 1],
    ['Varodi, E. I. & Malega, A. M. & Kuzmin, Y. I.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);