function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Hanley, J. Russell & Burke, Melanie', 1],
    ['Hartmann-Schröder, G.', 1],
    ['Kinberg, Johan Gustaf Hjalmar', 1],
    ['McCowin, Marina F. & Rouse, Greg W.', 4],
    ['Muir, Alexander I. & Bamber, Roger N.', 1],
    ['Piotrowski, Christina N. & Bolick, Holly & Harris, Leslie', 2],
    ['Ribas, Julia & Hutchings, Pat', 1],
    ['Salazar-Vallejo, Sergio I. & Carrera-Parra, Luis F.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);