function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. Ionescu & P. - A. Eyer', 6],
    ['Agosti, Donat', 104],
    ['Cedric A. Collingwood & Donat Agosti & Mostafa R. Sharaf', 21],
    ['Crawley, W. C.', 3],
    ['Ghahari, Hassan & Sharaf, Mostafar R. & Aldawood, Abdulrahman S.', 3],
    ['Gratiashvili, N. & Barjadze, S.', 3],
    ['Kiran, Kadri & Karaman, Celal', 6],
    ['Lapeva-Gjonova, Albena & Antonova, Vera', 7],
    ['Mayr, G.', 4],
    ['Mohamed, S. & Zalat, S. & Fadl, H.', 6],
    ['Paknia, O. & Radchenko, A. & Alipanah, H.', 14],
    ['Paknia, O. & Radchenko, A. & Pfeiffer, M.', 4],
    ['Salata, Sebastian & Kiyani, Haniyeh & Minaei, Kambiz', 7],
    ['Sharaf, Mostafa R. & Abdel-Dayem, Mahmoud S.', 4],
    ['Sharaf, Mostafa R. & Wetterer, James K. & Mohamed, Amr A.', 6],
    ['Other (18)', 33]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=231)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);