function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fernandez, Jacqueline & Duran, Luis', 1],
    ['Hernández-Orts, J. S. & Alama-Bermejo, G. & Carrillo, J. M.', 1],
    ['Holmes, John C.', 1],
    ['Ichihara, A.', 1],
    ['Layman, E. M.', 1],
    ['Odhner, T.', 1],
    ['Parukhin, A M', 1],
    ['Parukhin, A M & Tkachuk, L. P.', 1],
    ['Poddubnaya, Larisa G. & Hemmingsen, Willy & MacKenzie, Ken', 5],
    ['Smith, John W.', 2],
    ['Tantaleán, M. & Martínez, R.', 1],
    ['Villalba, César & Fernandez, Jacqueline', 4],
    ['Williams, H. Harford', 1],
    ['Yamaguti, S.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);