function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahmad, J.', 1],
    ['Bilqees, Fatima Mujib', 1],
    ['Bravo-Hollis, Margarita & Arroyo, G.', 1],
    ['Hafeezullah, M.', 1],
    ['Jimenez, F. G. & Caballero y C., Eduardo', 1],
    ['Manter, Harold W.', 2],
    ['Margarita Ostrowski de Núñez & Nathalia J. Arredondo', 2],
    ['Nahhas, Fuad M. & Cable, Raymond M.', 1],
    ['Pérez-Ponce de Leόn, Gerardo & Razo-Mendivil, U.', 1],
    ['Sparks, Albert K. & Thatcher, Vernon E.', 1],
    ['Szidat, L. & Graefe, Gernot', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);