function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bhutta, M. S. & Khan, D.', 1],
    ['Bilqees, Fatima Mujib', 1],
    ['Bray, Rodney A. & Cribb, Thomas H.', 1],
    ['Caballero y C., Eduardo', 1],
    ['Gavrilyuk-Tkachuk, L. P.', 1],
    ['Knoff, Marcelo & Fernandes, Berenice M. M.', 1],
    ['Lopes, Daniela A. & Mainenti, Adriana & Knoff, Marcelo', 1],
    ['Parukhin, A M', 4],
    ['Ramadan, M. M.', 2],
    ['Reimer, Lothar W.', 1],
    ['Sogandares-Bernal, F. & Hutton, Robert F.', 1],
    ['Wang, P. - q.', 1],
    ['Yamaguti, S.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);