function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Apostolov, Apostol', 2],
    ['Dimante-Deimantovica, I. & Jensen, T. C. & Walseng, B.', 2],
    ['Gómez, S. & Steinarsdóttir, M. B.', 1],
    ['Lee, J. M. & Chang, C. Y.', 1],
    ['Pugh, P. J. A. & Dartnall, H. J. G. & McInnes, S. J.', 1],
    ['Suárez-Morales, Eduardo & Fuentes-Reinés, Juan M.', 1],
    ['Suárez-Morales, Eduardo & Fuentes-Reinés, Juan Manuel', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);