function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Kandari, Manal Abdulrahman & Khalaji-Pirbalouty, Valiallah', 2],
    ['Bamber, Roger N.', 1],
    ['Barnard, Keppel Harcourt', 1],
    ['Harger, Oscar', 1],
    ['Kim, Sung Hoon & Yoon, Seong Myeong', 5],
    ['King, Rachael A. & Poore, Gary C. B.', 2],
    ['Lamarck, J. B. P. A. de M. de', 1],
    ['Song, Ji-Hun & Park, Taeseo & Kim, Won & Min, Gi-Sik', 3],
    ['Stransky, Bente & Svavarsson, Jörundur', 1],
    ['Stransky, Bente & Svavarsson, Jörundur & Poore, Gary C. B.', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);