function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Candek, Klemen & Gregoric, Matjaz & Kostanjsek, Rok', 2],
    ['Crespo, Luis C & Domenech, Marc & Enguidanos, Alba', 1],
    ['Crespo, Luis C. & Boieiro, Mario & Cardoso, Pedro', 2],
    ['Deltshev, Christo & Komnenov, Marjan & Blagoev, Gergin', 2],
    ['Isaia, Marco & Paschetta, Mauro & Chiarle, Alberto', 1],
    ['Marusik, Yu. M. & Larsen, N.', 1],
    ['Paschetta, Mauro & Christille, Claretta & Marguerettaz, Fabio', 1],
    ['Tanikawa, Akio', 2],
    ['Wang, Lu-Yu & Irfan, Muhammad & Chen, Hui-Ming', 7],
    ['Wang, Luyu & Zhou, Guchun & Irfan, Muhammad & Yang, Sufang', 5],
    ['Álvarez-Padilla, Fernando & Hormiga, Gustavo', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    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);