function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ali, Muhammad & Ahmed, Khalil & Ali, Shaukat & Raza, Ghulam', 1],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Hounkpati, Kwevitoukoui & Forrester, Juanita A.', 1],
    ['Hounkpati, Kwevitoukoui & McHugh, Joseph V. & Niang, Abdoul Aziz', 4],
    ['Mulsant, E.', 1],
    ['Najajrah, Mohammad H. & Swaileh, Khalid M. & Qumsiyeh, Mazin B.', 1],
    ['Nattier, Romain & Jourdan, Hervé & Mille, Christian', 4],
    ['Pinchao, Ever Camilo & Kondo, Takumasa & F, Guillermo González', 1],
    ['Poorani, J.', 3],
    ['Romanowski, Jerzy & Ceryngier, Piotr & Větrovec, Jaroslav', 1],
    ['Swezey, O. H.', 1],
    ['Weise, Jul.', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    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);